The true value (something I'm working on at the moment) is integrating this with Sauce (https://saucelabs.com/) to run in multiple browsers continuously.
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