Well, some of the will be different, some of them will be pretty similar to Google Answers' style.
It sounds like you're offering an answer service with a deadline, which is great, because now all you have to do is figure out what kind of questions people will ask, how to attract the people who can answer them, how to compensate everyone, and how to outcompete much larger rivals who can duplicate your entire product over their lunch break, while taking advantage of their existing network. Sounds pretty surefire!