Register your in-game account here: http://wow.ariesgamerz.com/

Replace your realmlist in the realmlist.wtf file with the information below. realmlist.wtf can be found in your WoW installation directory. As of the latest version 3.x.x patches, the realmlist now must use the set realmlistbn "" line.

For US clients: "\Data\enUS"

set realmlist ag.podzone.net
set patchlist us.version.worldofwarcraft.com
set realmlistbn ""
set portal us

or

For enGB clients: "\Data\enGB"

set realmlist ag.podzone.net
set patchlist eu.version.worldofwarcraft.com
set realmlistbn ""
set portal eu