Sith Inquisitor: Assassin it will be...
I've seen them in some video's and it seems they are very versatile.
They can tank, dps and range dps (heal too?). That's very usefull since it's quite difficult to predict which role will be 'needed' in the game. I suspect many people will play a 'simple' class like Jedi Knight DPS which makes tanks and ranged DPS very important.
"I think the Devil ****s Dutchmen."