New poster, longtime lurker. Just received an acceptance email from UCLA. They tell you in the subject line so there is no anxious logging-in or anything. I suspect that they are sending acceptances piecemeal rather than in "waves." This is my first acceptance, after a rejection from Berkeley and a interview/visit invite from Notre Dame.
Other notes: UCLA was my undergraduate institution, so I'm definitely waiting on other schools (like Columbia and Wisconsin). Key interests are in race, education, and immigration. Best of luck for everyone else!