Whew! I know a ton of people are waiting for this, so head on over to read the official announcement.
There’s a huge list of new features, and I know there’s been a ton of trac activity squashing bugs, so now we can all give it a try.
Most notable is a change to the signup page, so if you have *any* plugins that interact with that, they’ll most likely break. See Donncha’s post for details.