But as of the release of OpenBSD 3.2, this was the list; you may be able to skip downloading the selection by putting in one of these names directly:
ftp://ftp.openbsd.org/pub/OpenBSD Alberta, Canada ftp://gulus.usherb.ca/pub/OpenBSD Sherbrooke, Canada ftp://gandalf.neark.org/pub/distributions/OpenBSD Batesville, AR, USA ftp://ftp5.usa.openbsd.org/pub/OpenBSD Redwood City, CA, USA ftp://ftp3.usa.openbsd.org/pub/OpenBSD Boulder, CO, USA ftp://mirror.csit.fsu.edu/pub/OpenBSD Tallahassee, FL, USA ftp://ftp.src.uchicago.edu/pub/OpenBSD Chicago, IL, USA ftp://rt.fm/pub/OpenBSD Lake in the Hills, IL, USA ftp://archive.progeny.com/OpenBSD Indianapolis, IN, USA ftp://ftp7.usa.openbsd.org/pub/os/OpenBSD West Lafayette, IN, USA ftp://mirrors.netnumina.com/openbsd Cambridge, MA, USA ftp://ftp.groupbsd.org/pub/OpenBSD Hillsborough, NC, USA ftp://ftp.cse.buffalo.edu/pub/OpenBSD Buffalo, NY, USA ftp://carroll.cac.psu.edu/pub/OpenBSD State College, PA, USA ftp://mirrors.rcn.net/pub/OpenBSD Fairfax, VA, USA ftp://openbsd.secsup.org/pub/openbsd Fairfax, VA, USA ftp://ftp.tux.org/bsd/openbsd Springfield, VA, USA ftp://mirror.cs.wisc.edu/pub/mirrors/OpenBSD Madison, WI, USA ftp://ftp.iij.ad.jp/OpenBSD Tokyo, Japan ftp://ftp.jp.openbsd.org/pub/OpenBSD Tokyo, Japan ftp://ftp.kddlabs.co.jp/OpenBSD Tokyo, Japan ftp://ftp.fr.openbsd.org/pub/OpenBSD Paris, France ftp://ftp.bsdfr.org/pub/OpenBSD Paris, France ftp://ftp.club-internet.fr/pub/OpenBSD Paris, France ftp://ftp.de.openbsd.org/pub/unix/OpenBSD Berlin, Germany ftp://ftp.freenet.de/pub/ftp.openbsd.org/pub/OpenBSD Duesseldorf, Germany ftp://ftp-stud.fht-esslingen.de/pub/OpenBSD Esslingen, Germany ftp://pandemonium.tiscali.de/pub/OpenBSD Frankfurt, Germany ftp://ftp.leo.org/pub/OpenBSD Muenchen, Germany ftp://ftp.uni-stuttgart.de/pub/OpenBSD Stuttgart, Germany ftp://ftp.fh-wolfenbuettel.de/pub/os/openbsd Wolfenbuettel, Germany ftp://mirror.aarnet.edu.au/pub/OpenBSD Canberra, Australia ftp://ftp.it.net.au/mirrors/OpenBSD Perth, Australia ftp://ftp.planetmirror.com/pub/OpenBSD Sydney, Australia ftp://ftp.wiretapped.net/pub/OpenBSD Sydney, Australia ftp://gd.tuwien.ac.at/opsys/OpenBSD Vienna, Austria ftp://mingus.wu-wien.ac.at/pub/OpenBSD Vienna, Austria ftp://openbsd.rug.ac.be/pub/OpenBSD Ghent, Belgium ftp://ftp.openbsd.org.br/pub/OpenBSD Curitiba, Brasil ftp://ftp.ca.openbsd.org/pub/OpenBSD Edmonton, Canada ftp://ftp.shellhung.org/pub/OpenBSD Hong Kong, China ftp://ftp.openbsd.cz/pub/OpenBSD Czech Republic ftp://sunsite.dk/mirrors/openbsd Denmark ftp://ftp.fi.debian.org/pub/OpenBSD Finland ftp://ftp.jyu.fi/pub/OpenBSD Jyvaskyla, Finland ftp://filoktitis.noc.uoa.gr/pub/OpenBSD Athens, Greece ftp://ftp.physics.auth.gr/pub/mirrors/OpenBSD/OpenBSD Thessaloniki, Greece ftp://ftp.duth.gr/pub/OpenBSD Thrace, Greece ftp://ftp.fsn.hu/pub/OpenBSD Hungary ftp://ftp.esat.net/pub/OpenBSD Dublin, Ireland ftp://ftp.openbsd.it/pub/OpenBSD Napoli, Italy ftp://ftp.volftp.mondadori.com/mirror/openbsd Italy ftp://ftp.netlab.is.tsukuba.ac.jp/pub/os/OpenBSD Ibaraki, Japan ftp://ftp.openbsd.lt/pub/OpenBSD Lithuania ftp://ftp.nl.uu.net/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.calyx.nl/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.nluug.nl/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.inet.no/pub/OpenBSD Oslo, Norway ftp://ftp.uninett.no/pub/OpenBSD Oslo, Norway ftp://ftp.sajinet.com.pe/pub/OpenBSD Peru ftp://sunsite.icm.edu.pl/pub/OpenBSD Poland ftp://ftp.chg.ru/pub/OpenBSD Chernogolovka, Russia ftp://ftp.gamma.ru/pub/OpenBSD Moscow, Russia ftp://ftp.radio-msu.net/pub/OpenBSD Moscow, Russia ftp://ftp.isu.net.sa/pub/mirrors/ftp.openbsd.org/pub/OpenBSD Saudi Arabia ftp://ftp.snu.ac.kr/pub/BSD/OpenBSD Seoul, South Korea ftp://ftp.rediris.es/mirror/OpenBSD Madrid, Spain ftp://ftp.stacken.kth.se/pub/OpenBSD Stockholm, Sweden ftp://ftp.sunet.se/pub/OpenBSD Uppsala, Sweden ftp://mirror.pudas.net/OpenBSD Uppsala, Sweden ftp://sunsite.cnlab-switch.ch/pub/OpenBSD Zurich, Switzerland ftp://openbsd.csie.nctu.edu.tw/pub/OpenBSD Taiwan ftp://openbsd.nsysu.edu.tw/pub/OpenBSD Taiwan ftp://ftp.tku.edu.tw/pub/OpenBSD TamSui, Taiwan ftp://ftp.kmitl.ac.th/pub/OpenBSD Thailand ftp://ftp.linux.org.tr/OpenBSD Turkey ftp://ftp.plig.org/pub/OpenBSD London, UK http://mirror.aarnet.edu.au/pub/OpenBSD Canberra, Australia http://www.openbsd.aba.net.au/pub/OpenBSD Melbourne, Australia http://ftp.planetmirror.com/pub/OpenBSD/ Sydney, Australia http://the.wiretapped.net/OpenBSD Sydney, Australia http://gd.tuwien.ac.at/opsys/OpenBSD Vienna, Austria http://openbsd.rug.ac.be/ftp/pub/OpenBSD Ghent, Belgium http://www.ualberta.ca/FTP/Mirror/OpenBSD Edmonton, Canada http://gulus.usherb.ca/ftp/OpenBSD Sherbrooke, Canada http://ftp.fi.debian.org/OpenBSD Finland http://ftp.jyu.fi/ftp/pub/OpenBSD Jyvuskyla, Finland http://ftp-stud.fht-esslingen.de/pub/OpenBSD Esslingen, Germany http://pandemonium.tiscali.de/pub/OpenBSD Frankfurt, Germany http://ftp.uni-stuttgart.de/pub/OpenBSD Stuttgart, Germany http://ftp.openbsd.it/OpenBSD Napoli, Italy http://ftp.sunet.se/pub/OpenBSD Uppsala, Sweden http://mirror.pudas.net/OpenBSD Uppsala, Sweden http://ftp.tku.edu.tw/pub/OpenBSD TamSui, Taiwan http://openbsd.nsysu.edu.tw/pub/OpenBSD Taiwan http://gandalf.neark.org/pub/distributions/OpenBSD Batesville, AR, USA http://east.dl.sourceforge.net/mirrors/OpenBSD/ Sunnyvale, CA, USA http://mirror.csit.fsu.edu/pub/OpenBSD Tallahassee, FL, USA http://rt.fm/pub/OpenBSD Lake in the Hills, IL, USA http://archive.progeny.com/OpenBSD Indianapolis, IN, USA http://ftp7.usa.openbsd.org/pub/os/OpenBSD West Lafayette, IN, USA http://openbsd.mirrors.netnumina.com Cambridge, MA, USA http://carroll.cac.psu.edu/pub/OpenBSD State College, PA, USA http://mirrors.rcn.net/pub/OpenBSD Fairfax, VA, USA http://openbsd.secsup.org/pub/openbsd Fairfax, VA, USA http://www.tux.org/pub/bsd/openbsd Springfield, VA, USA http://mirror6.cs.wisc.edu/pub/mirrors/OpenBSD Madison, WI, USA ftp://ftp.openbsd.org/pub/OpenBSD Alberta, Canada ftp://mirror.aarnet.edu.au/pub/OpenBSD Canberra, Australia ftp://ftp.it.net.au/mirrors/OpenBSD Perth, Australia ftp://ftp.planetmirror.com/pub/OpenBSD Sydney, Australia ftp://ftp.wiretapped.net/pub/OpenBSD Sydney, Australia ftp://gd.tuwien.ac.at/opsys/OpenBSD Vienna, Austria ftp://mingus.wu-wien.ac.at/pub/OpenBSD Vienna, Austria ftp://openbsd.rug.ac.be/pub/OpenBSD Ghent, Belgium ftp://ftp.openbsd.org.br/pub/OpenBSD Curitiba, Brasil ftp://ftp.ca.openbsd.org/pub/OpenBSD Edmonton, Canada ftp://gulus.usherb.ca/pub/OpenBSD Sherbrooke, Canada ftp://ftp.shellhung.org/pub/OpenBSD Hong Kong, China ftp://ftp.openbsd.cz/pub/OpenBSD Czech Republic ftp://sunsite.dk/mirrors/openbsd Denmark ftp://ftp.fi.debian.org/pub/OpenBSD Finland ftp://ftp.jyu.fi/pub/OpenBSD Jyvaskyla, Finland ftp://ftp.fr.openbsd.org/pub/OpenBSD Paris, France ftp://ftp.bsdfr.org/pub/OpenBSD Paris, France ftp://ftp.club-internet.fr/pub/OpenBSD Paris, France ftp://ftp.de.openbsd.org/pub/unix/OpenBSD Berlin, Germany ftp://ftp.freenet.de/pub/ftp.openbsd.org/pub/OpenBSD Duesseldorf, Germany ftp://ftp-stud.fht-esslingen.de/pub/OpenBSD Esslingen, Germany ftp://pandemonium.tiscali.de/pub/OpenBSD Frankfurt, Germany ftp://ftp.leo.org/pub/OpenBSD Muenchen, Germany ftp://ftp.uni-stuttgart.de/pub/OpenBSD Stuttgart, Germany ftp://ftp.fh-wolfenbuettel.de/pub/os/openbsd Wolfenbuettel, Germany ftp://filoktitis.noc.uoa.gr/pub/OpenBSD Athens, Greece ftp://ftp.physics.auth.gr/pub/mirrors/OpenBSD/OpenBSD Thessaloniki, Greece ftp://ftp.duth.gr/pub/OpenBSD Thrace, Greece ftp://ftp.fsn.hu/pub/OpenBSD Hungary ftp://ftp.esat.net/pub/OpenBSD Dublin, Ireland ftp://ftp.openbsd.it/pub/OpenBSD Napoli, Italy ftp://ftp.volftp.mondadori.com/mirror/openbsd Italy ftp://ftp.netlab.is.tsukuba.ac.jp/pub/os/OpenBSD Ibaraki, Japan ftp://ftp.iij.ad.jp/OpenBSD Tokyo, Japan ftp://ftp.jp.openbsd.org/pub/OpenBSD Tokyo, Japan ftp://ftp.kddlabs.co.jp/OpenBSD Tokyo, Japan ftp://ftp.openbsd.lt/pub/OpenBSD Lithuania ftp://ftp.nl.uu.net/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.calyx.nl/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.nluug.nl/pub/OpenBSD Amsterdam, The Netherlands ftp://ftp.inet.no/pub/OpenBSD Oslo, Norway ftp://ftp.uninett.no/pub/OpenBSD Oslo, Norway ftp://ftp.sajinet.com.pe/pub/OpenBSD Peru ftp://sunsite.icm.edu.pl/pub/OpenBSD Poland ftp://ftp.chg.ru/pub/OpenBSD Chernogolovka, Russia ftp://ftp.gamma.ru/pub/OpenBSD Moscow, Russia ftp://ftp.radio-msu.net/pub/OpenBSD Moscow, Russia ftp://ftp.isu.net.sa/pub/mirrors/ftp.openbsd.org/pub/OpenBSD Saudi Arabia ftp://ftp.snu.ac.kr/pub/BSD/OpenBSD Seoul, South Korea ftp://ftp.rediris.es/mirror/OpenBSD Madrid, Spain ftp://ftp.stacken.kth.se/pub/OpenBSD Stockholm, Sweden ftp://ftp.sunet.se/pub/OpenBSD Uppsala, Sweden ftp://mirror.pudas.net/OpenBSD Uppsala, Sweden ftp://sunsite.cnlab-switch.ch/pub/OpenBSD Zurich, Switzerland ftp://openbsd.csie.nctu.edu.tw/pub/OpenBSD Taiwan ftp://openbsd.nsysu.edu.tw/pub/OpenBSD Taiwan ftp://ftp.tku.edu.tw/pub/OpenBSD TamSui, Taiwan ftp://ftp.kmitl.ac.th/pub/OpenBSD Thailand ftp://ftp.linux.org.tr/OpenBSD Turkey ftp://ftp.plig.org/pub/OpenBSD London, UK ftp://gandalf.neark.org/pub/distributions/OpenBSD Batesville, AR, USA ftp://ftp5.usa.openbsd.org/pub/OpenBSD Redwood City, CA, USA ftp://ftp3.usa.openbsd.org/pub/OpenBSD Boulder, CO, USA ftp://mirror.csit.fsu.edu/pub/OpenBSD Tallahassee, FL, USA ftp://ftp.src.uchicago.edu/pub/OpenBSD Chicago, IL, USA ftp://rt.fm/pub/OpenBSD Lake in the Hills, IL, USA ftp://archive.progeny.com/OpenBSD Indianapolis, IN, USA ftp://ftp7.usa.openbsd.org/pub/os/OpenBSD West Lafayette, IN, USA ftp://mirrors.netnumina.com/openbsd Cambridge, MA, USA ftp://ftp.groupbsd.org/pub/OpenBSD Hillsborough, NC, USA ftp://ftp.cse.buffalo.edu/pub/OpenBSD Buffalo, NY, USA ftp://carroll.cac.psu.edu/pub/OpenBSD State College, PA, USA ftp://mirrors.rcn.net/pub/OpenBSD Fairfax, VA, USA ftp://openbsd.secsup.org/pub/openbsd Fairfax, VA, USA ftp://ftp.tux.org/bsd/openbsd Springfield, VA, USA ftp://mirror.cs.wisc.edu/pub/mirrors/OpenBSD Madison, WI, USA http://mirror.aarnet.edu.au/pub/OpenBSD Canberra, Australia http://www.openbsd.aba.net.au/pub/OpenBSD Melbourne, Australia http://ftp.planetmirror.com/pub/OpenBSD/ Sydney, Australia http://the.wiretapped.net/OpenBSD Sydney, Australia http://gd.tuwien.ac.at/opsys/OpenBSD Vienna, Austria http://openbsd.rug.ac.be/ftp/pub/OpenBSD Ghent, Belgium http://www.ualberta.ca/FTP/Mirror/OpenBSD Edmonton, Canada http://gulus.usherb.ca/ftp/OpenBSD Sherbrooke, Canada http://ftp.fi.debian.org/OpenBSD Finland http://ftp.jyu.fi/ftp/pub/OpenBSD Jyvuskyla, Finland http://ftp-stud.fht-esslingen.de/pub/OpenBSD Esslingen, Germany http://pandemonium.tiscali.de/pub/OpenBSD Frankfurt, Germany http://ftp.uni-stuttgart.de/pub/OpenBSD Stuttgart, Germany http://ftp.openbsd.it/OpenBSD Napoli, Italy http://ftp.sunet.se/pub/OpenBSD Uppsala, Sweden http://mirror.pudas.net/OpenBSD Uppsala, Sweden http://ftp.tku.edu.tw/pub/OpenBSD TamSui, Taiwan http://openbsd.nsysu.edu.tw/pub/OpenBSD Taiwan http://gandalf.neark.org/pub/distributions/OpenBSD Batesville, AR, USA http://east.dl.sourceforge.net/mirrors/OpenBSD/ Sunnyvale, CA, USA http://mirror.csit.fsu.edu/pub/OpenBSD Tallahassee, FL, USA http://rt.fm/pub/OpenBSD Lake in the Hills, IL, USA http://archive.progeny.com/OpenBSD Indianapolis, IN, USA http://ftp7.usa.openbsd.org/pub/os/OpenBSD West Lafayette, IN, USA http://openbsd.mirrors.netnumina.com Cambridge, MA, USA http://carroll.cac.psu.edu/pub/OpenBSD State College, PA, USA http://mirrors.rcn.net/pub/OpenBSD Fairfax, VA, USA http://openbsd.secsup.org/pub/openbsd Fairfax, VA, USA http://www.tux.org/pub/bsd/openbsd Springfield, VA, USA http://mirror6.cs.wisc.edu/pub/mirrors/OpenBSD Madison, WI, USA