Hi there! Long time lurker, first time poster. First, thank you so much to everyone posting - it has made the process so much more bearable!
Second - in response to the UCLA stuff - this is my third year applying. I know a lot about the UCLA program through friends. They do not send out "official" notices until March - but frankly those students who are accepted are notified by late February. Some schools seem to do that - send out the letters later - I believe it is a way to cover themselves if - say - all accepted students choose somewhere else or whatnot, as well as managing the wait list (I'm not sure when they give wait list notifications). Just my personal opinion - I don't have any definitive info on it - but unfortunately it leaves everyone waiting in the lurch!
In terms of the Columbia post - my slideroom status also changed to 2012 Sculpture - which unfortunately I don't think is a good sign since my last year status says "2011 Sculpture" and I was rejected. Sorry I really hope I'm wrong. Based on past years I think we should hear from them this week for interviews (but they too will not send out neg letters until late March.)