ecdoesit,
Congratulations on your interview!!!
I wish I had some good advice to give you but it's nothing you haven't heard already on SDN. Both the student interview and the faculity interviewers were nice. My faculity interviewer was a bit curt and to-the-point. In other words I didn't get warm fuzzies when meeting with him. However, towards the end of the session I started to feel a little better once I got the focus of me for a minute and asked him to tell me a little about himself. On a scale for stess, I would say about a 4-5/10. I was very nervous at my interview. I hadn't heard from any other schools at that time and UCSF was/is my first choice. I didn't want to screw up and so the stress was mostly self inflicted. Both interviews went well, I mean, as well as they could go I suppose. The questions were focused and directed and I just answered them honestly.
There is one thing that I would recommend doing and that is going through lists of questions with someone a few weeks in advance. My girlfriend helped me to widdle down my responses to their essence and outline the important things about myself and my experiences so that I could put those out on the table when asked specific questions. Making an outline for each question, or at least narrowing down a response a head of time really helped me stay on track and put my best foot forward on certain questions. Preparing like this helped with the standard questions like: "Why do you think you'll be an assest to UCSF?", "Tell me a little about yourself." and "Why do you want to be a dentist?".
Make sure you now where to go ahead of time and don't be late (like someone on my interview day. Ouch!) I stayed accross the street so I could just walk over in the morning instead of trying to get a taxi or bus from a hotel further away.
Everyone is really nice there and the clinics are beautiful.
Have a great time! You will, I'm sure of it. If I can answer any more questions or if I did't answer your questions feel free to write me.
Best of luck!