I know a great deal of groups use Rizon to host channels for their groups. I unfortunately lost my favourites list so I can't remember where I used to visit, but I know #eclipse has done great work on various series, and #DCTP has great stuff for Detective Conan.

Anyone else know some good ones? I think probably Chihiro and others... I know a lot of channels go inactive but the groups who keep working are really populated I've found.

I guess going through animu folder to check and see groups since they usually list the IRC on their info on opening credits.