Based on what I've read, when you meet your first group member, the 2 of you get in a conversation about what happened over the past few years. If you answer the questions a certain way, the game infers that you (as Revan in game 1) were light-side or dark-side, male or female.
For example, you're told that Revan disappeared. If you answer "Revan, didn't he save the Republic from Sith forces a few years ago?" You can infer that a male, light-side character was used.
Also, I just saw in today's Best Buy add, KorOR is on a 2 for $30 list of games, so you can get it cheaper than $20.
I'm disappointed by the non-simultaneous release.
However, I'm really excited about all the gameplay stuff I've heard about:
(I don't think these are spoilers...)
- Characters attitudes shift with you (you become evil, so do they)
- Each party member has some special ability (the soldier that doesn't collapse if someone else is standing, the Jedi that gives a bonus to experience gain, the bounty hunter with the wrist-rockets)
- I read something where someone said that there is a surprise in the game that rivals that of "Luke, I am your father." for its surprise value.
- Lightsaber dueling styles (some defensive, some offensive, some chaotic, at least 1 is a balance)
- no level cap
- the prestige levels
- Force Crush!!!!