Can't wait for this game. Great MMO gameplay + Bioware's great storytelling = win all around.
The scene with the armies of Jedis and Sith is pretty cool also. Haven't ever seen that in onscreen Star Wars.
One of the things I read about this game, was that each "class" (Jedi, Bounty Hunter, etc etc) would have its own unique story. So your experience playing as one class is completely different than the other. If you think about it, it's not as complicated as it sounds, you just create 4 or 6 through-lines.
Add in the fact that most MMO'ers really only spend time with one or two characters , you've got a pretty long unique experience.