Welcome to the Buster.JS beta!
Buster.JS is a new JavaScript testing framework. It does browser testing by automating test runs in actual browsers (think JsTestDriver), as well as Node.js testing. It has a bunch of great features, take a look at the overview.
It's very much in beta. A lot of stuff is not working. Follow us on twitter to get notified when stuff happens. Or join the mailing list. There's also an IRC channel, #buster on irc.freenode.net.
Here's a talk about Buster.JS by Christian Johansen.