GitHub is a fantastic tool — I use it constantly. I'd like to understand more of how I work on GitHub, but I don't have all my data. I can setup an RSS hook on my public feed, but I do a lot of work on private repos as well. This webapp is a simple data collector: add it to repos in question and it'll log everything you do on that repo.
It's all in Mongo. Now it's your job to get and understand it.