hey rock,
congrats on the interview! i posted feedback on my interview at penn state on interviewfeedback.com, but I'll try to remember some tips... first of all, I loved the school-really nice students who have lunch with you, a beautiful location (though rural-ish), really impressive hospital (all of the patient rooms are singles), and the interviewers were very conversational. You have two interviews..they didn't really ask me any difficult questions (i.e. no ethical dilemmas or managed care questions); basically they were looking at my extracurriculars on the amcas form and asking me to elaborate on them; of course they also wanted to know "why medicine?". You should also be ready to tell them why you want to go to Penn State, especially if you are not from PA, or not used to a small town setting. And you should also be ready to answer "what would you do if you are not accepted in a med school this year?" (I believe the "correct" answer is that you will re-examine your app, address the weak parts, and reapply undaunted. It was a very pleasant visit all around. Oh, one more thing, my interviewers actually talked about my SAT scores (! they seem so long ago), which Penn State had asked for in their secondary... best of luck on your interview! Let me know if you have any other specific questions-