With little fanfare, GitHub has released Janky under the MIT license. Janky is a continuous integration (CI) server that runs on top of Jenkins and Hubot, designed to work with projects hosted on GitHub.
Janky, at least as published yesterday by GitHub, is set up to run on top of Heroku. The Heroku app files are stored in a Gist, and can be deployed to Heroku in just a few commands. Naturally, you’ll need a Jenkins install as well.
Once deployed, Janky is controlled with GitHub’s Hubot. It looks like Campfire (the collaboration/chat solution from 37Signals) is required to use Janky at the moment, but if Janky takes off I’d expect to see an IRC option as well.