I didn't apply to UCSD or UCLA but I heard back from a faculty member at Berkeley about a week and a half ago. I was reading some old admissions forums and some people received their official acceptances without being contacted by a professor. They haven't sent official acceptances yet so there is still hope if you haven't heard from them yet!
Also to those wondering about Caltech organic, my interviewer mentioned more interviews are going on early next week, and these interviews were not listed on the initial schedule, which makes me think they are not done sending out interviews to prospectives.