OK so.
ANO left, they are on retail. (your more than welcome to come, I need Ranged DPS for my 10 man core team :/ )
Wrath of Hell Legion, they are still there, believe quality of quantity and no longer recruit in mass, rather than private invitation.
Endoderm sort of just dissappeared. Quelthanas is kicking around the forum under the name of McClain if you wanna go find him.
Blazing semi merged with Myrmidons.
Wicked just seems to vanish.
You want hardcore PvE, Myrmidons.
You want hardcore PvP, if your Skilled go Wrath of Hell Legion, if you are more the "have fun" go Knights of Serenity.