vBulletin 3.7 was released a couple of weeks ago. After installing and using it on a test forum without any problems, I just installed it on the live forum an hour or so ago.
There will be some tweaks to graphics. phrases, and other things in the coming weeks. (edit: I know there's an issue with the message editor and text color selection.)
Explore a bit, and have fun with some of the new features!
EDIT: fixed the message/post editor.