most people that have called UCLA have been told there is no decision made yet on their application. the admissions committee has said they will not rush notification for seat deposits at other schools, as far as I can tell. They seem to tell people (no matter what month it is) that decisions will be made by "the end of the month."
I don't see how calling could hurt, but I doubt they will tell you anything different. Maybe if enough people call, they will get the picture that we are all sick and tired of waiting, but they seem to work at their own pace and they don't care about applicant feelings at all.
good luck, whatever you decide.