Ok, so far these clans are participating for sure:
GpW = Gurus of Proactive Warfare
CC = Cracco Clan
TEC = The Elemental Clan
TF = Total Freaks
XD = Xtreme Bunnies
BOD = Brotherhood Of Death
And this clan most likely:
DM = Dark Mercenaries

That's 7. Room for one more clan!