It would be a good idea I think to not simply have the Kotor1 characters show up for a scene or two and then dissappear for the rest of the game. I think they should be constantly showing up throughout the game to give you help, add to the storyline or even pose a threat...
I'm not sure how you'll do this, but maybe we should be able to name the character we played in Kotor 1, choose the model we used and that character could be in Kotor 2 while I play as a new character.
I'm sure you'll do a great job Obsidian! Have fun,
Daniel.