Not sure how full their class is, but at my interview they said that they were going to start getting more selective because the interview process was winding down. Have you got your secondary submitted yet? How late was your application btw? I interviewed in February and submitted my application in August. If you haven't submitted a secondary yet, maybe you could submit a letter of interest with it?
And as far as the school goes, it's great ... but you have to be able to see past the campus. It's on an island that is undergoing a LOT of construction right now. It has one of the best match lists. And I'm not sure where this is on usnews.com but according to this page
http://www.tucom.edu/admissions.htm it's ranked 11th in Primary Care (maybe in the new rankings, because the one's that are up right now don't have it listed at all). That said, did you apply to their Nevada campus? That is definitely a nice school as well, although very new, and I had a difficult time deciding between them... but the weather during summer can be a little harsh. Ultimately the fact that I had family in CA made my decision for me. Their interview process is different from most other schools. It involves 4-5 students with 4-5 doctors/professors in one room. They pretty much go around and ask you questions. It sounds stressful, but it really isn't that bad once you are doing it.
Good Luck