Update: Bad news, folks - the updater is not compatible with Vista. Will the pain never end? Fortunately, we have an XP machine around. We're downloading the update right now - expect a hands-on soon! ...and by "soon" we mean "in 20 or 30 years, because that's how long the download is going to take given how hard the servers are being hammered right now."
It's been months of waiting, now we're down to just hours. At 5pm EST, go get it.