Someone less lazy than me should post on these forums:
www.afraidyet.net - Sinister, aka SiN, aka The Dark Coalition
www.theregulators.org - The Regulators, TR
www.themercs.org - The Mercs, TM
www.nurfed.com - Nurfed
http://www.mimguild.com - MiM, they have front page news on this but a post prob wouldn't hurt
http://the-darkhand.com - Disciples of the Darkhand, DDH
http://www.the-legion.com/ - The Legion