Running JavaScript tests on Jenkins CI
blog.iterate.no
blog.iterate.no
http://mikekusold.com/blog/Development/2012-06-05/deploying-...
BrowserStack (another browser-in-the-cloud provider) has an API [0] which would make this task quite easy. Just add another build step with a script that POST to /browser that contains the URL of the Buster server. (They also have tunneling support.)
[0] http://www.browserstack.com/automated-browser-testing-api