Well, about Keck/USC, I have heard from several reliable sources that they are really pushing the academia angle this year. They are currently building a new genomics building with the Keck grant, and they would like to put themselves in the top 10 research schools (I think they're in the 20s right now), and in order to do that, they need to have some good faculty to bring in the grants and do the research. If you are interested in reseach, it would be a plus to say so, but I don't think you have to say you, personally, want to conduct research. Also, they specifically ask you about your interest in becoming a faculty member - a lot of doctors want to be associated with a medical school (to teach, etc.), but to do that, you also have to do some kind of research. It's great just to be interested because that means you will stay on top of the technology as a doctor. Besides, USC is pretty big on primary care as well - they like to see community service and commitment to the underserved. Well, there's my two cents.