I have been wondering the same thing about UCSF -- I was hoping that they would let us know either way, considering the amount of effort required for that supplemental app!
They emailed me back to say they had received the supplemental form and would be contacting applicants early the next week but didn't contact me to reject me. Somebody else on the forum posted that they had received an email about being moved on to the next round in the review process or something but I didn't hear any more than that and wasn't 100% sure if that was above and beyond the email they sent about having the supplemental materials. But, yeah, it would be nice to at least get a rejection email after spending so much time on the supplemental form.
I am having a similar dilemma to others in that I am trying to decide whether to rank my bottom choice at all or if I would rather try my luck again next year. However, I don't want to end up at a program where I would (a) be miserable and/or (b) feel like my future career/postdoc options were damaged by the caliber of the site. If I wait and reapply, I might have a shot again at sites that I am excited about.
I don't think that your post-internship plans would be hugely damaged by going to a less preferred internship. If you go to one where you can get a postdoc that can make a positive difference, but I really don't think that beyond that, anybody cares about where you do your internship (well, APA accreditation probably matters). But if you're going to be miserable, that's obviously another story and a personal decision. Good luck with it, anyway.