q3 master servers and the point release each master is currently reporting:
Master servers:
203.57.20.3:27950 protocols 45,46,48,66,67,68
212.63.23.171:27950 protocols 45,46,48,67,68
cctf.dhs.org:27950 protocols 45,46,48,67,68
clanservers.net:27950 protocols 66,67,68
master.gnw.de:27950 protocols 45,46,48,67,68
master.ngi.it:27950 protocols 45,46,48,66,67,68
master.quake3arena.com:27950 protocols 43,44,45,46,47,48,49,66,67,68
master.quake3world.com:27950 protocols 43,44,45,46,47,48,49,66,67,68
master3.idsoftware.com:27950 protocols 66,67,68
q3master.barrysworld.com:27950 protocols 66,67,68
master.urbanterror.net 27950
HTTP:
http://www.gameaholic.com:80/servers/qspy-quake3
http://www.telefragged.com:80/server_listings/quake3