I received the general email earlier this morning as well, although I haven't heard anything since. I'm excited (and a little bit nervous) - I'll feel a hell of a lot more relaxed if an official letter/email comes.
Looks like an acceptance by email went up on the survey today! Have any of you heard anything?
Look at the top listing here: http://www.thegradcafe.com/survey/index.php?q=stanford+statistics&t=a&o=d&pp=25