By the way, as someone who has gone through the process at Wake, I've said this before, and will say it again, make sure you show interest in the school. They extend interviews to some people, reject some people, and the majority are put into a hold type category. Since they haven't actually started interviewing yet (I think Monday is the first day), they are probably booked up for a month or so. However, I know quite a few people on that hold list who called, and basically scheduled an interview over the phone. They want to know that you are interested and that you are willing to follow up. So if you have called once, wait a month, and call again. And if anything changes in your application (grades, EC's, etc.) send them a letter to let them know.
If you do interview and really like the school, send them a letter and let them know that, especially if it is your first choice.