Is it possible to host dynamic content through GitHub:Pages? More specifically, we are using GitHub Enterprise, so we have a little more control, but I'm not aware of what dynamic content languages (Ruby, Python, ???) we might be able to use.
Since it based on rendering plain files from a git repository, I don't think you can use dynamic information. The goals of Github Pages is to show a static site easily from an open source project.
You can still contact them and I think you have a dedicated support if you use Github Enterprise.