I've been relying on GradCafe for information about admission notifications quite a bit so I decided to finally post my information...these are all PhD or MS/PhD programs.
Rejected:
MIT
CalTech
Accepted:
Harvard (got unofficial acceptance from professors at the end of January)
Stanford (in early March, then a few days later they sent me a fellowship offer for the first year)
USC (end of February, with USC Provost Fellowship)
Michigan (early February, no real news about funding, but I didn't really follow things up here)
Berkeley (it took them forever to send me a decision--I just got the acceptance yesterday!)
I spent quite a bit of time deciding between Harvard and Stanford, but I finally settled on Harvard.