I just discovered the Stack Exchange Data Explorer. It's pretty great! But it hasn't been formally announced on the Stack Overflow or Stack Exchange blog. Is there a reason for this? As far as I can tell from the FAQ and the about page, it's not in beta. But the only way one would know about it is by following Meta (which I haven't had much time to do lately, and a lot of Stack Overflow users don't do at all).
As of June 13th 2010, SEDE is officially announced, read all about it here: http://blog.stackoverflow.com/2010/06/introducing-stack-exchange-data-explorer/