Actually, almost ALL fasubgroups have channels on different irc servers. Find out what you want, find a group that has subbed it, find out where the group can be found.
irc.aniverse.com is popular.
I hardly get any anime from IRC these days, used to when it was the only way to get subs tho ^^
As IRC-nets change rules, groups change nets. There are loads on aniverse tho. You may also try irc.mircx.com.
edit:
btw, most anime is spread by bittorrent these days. There are also *loads* of dc++ hubs that are anime only.
check link in sig, check link section, I am sure you will find more than enuff.