Neverwinter Nights 2 will be here before you know it, so start thinking of those character concepts. The campaign will start in a small village in the Duchy of Elik. As you think of your character's background, think of a reason why you'd be in the small mountain village where the campaign will start. I haven't decided on the exact village yet. It is small enough that it probably won't be on the map anyway. Feel free to post any questions or comments in your private forum here, and I can work with you. Also, some of you may want to have your background intertwined with that of another player or players. That should be fine, so feel free to discuss it amongst yourselves.
If it helps you plan a character concept, the kernel of the plot idea in my head involves whisperings and rumors of a great prophet that has emerged in the mountains, traveling the peaks among the villages and keeps. Use it or don't use it in your character idea, as you see fit, and also remember that there is a chance it could change.
Players will start with all new characters, most likely at level 1. Keep that in mind when developing your character background (e.g. it is unlikely that a level 1 character would be a famous warrior with his own keep and army, etc.).