I think it would be cool to set up a 'github' 'p2p protocol' where if you sign up with one server you can access projects from any other server following the protocol. For example, I run my own 'github' instance just for me on my personal server. A company can host an instance on their servers and, if they implement the protocol, I can use my instance to submit a pull request on a repository they host. Complete interoperability.