I am curious to know if you, or anyone you know, has been accepted to a California university from a wait list? If so, which school and what is your/their major?
If you search the individual colleges, you will find waitlist threads with that information.
Gotcha. Thank you! 
Okay, so I tried to search by school and am not seeing any current threads regarding the wait lists in California. So, my question still stands.
The colleges in California that I know that have taken applicants off the waitlist are Cal Poly SLO, UC Berkeley, UCSD (for transfers only so far), UC Riverside, CSU Fullerton, Cal Poly Pomona. I am sure there are a few more.
Edited: UCSC took some International and out of state applicants off the waitlist.
@Betterhalf: Is there any particular school you are interested in finding out about?
I can also tell you that UCI slammed the door shut on the waitlist group last Friday.
As a corollary question, I’d like to know if the UCs tell each other who was accepted and who SIR’ed. It certainly seems that the answer is yes.