Actually its not a bummer at all, Github has an amazing set of features, 99% why people use git, including me, is because of Github. Taking also into account that no other alternative of Github is as remotely as popular and the biggest competitor , gitorious , just died.
Having Github API suppoer inside Pharo is as important if not more important than having git support. You can even commit files with the Github API, so its far from just a browser, issue and wiki tracker. I will definetly take a look at your code and I would like to thank you as a huge fan of Github, very much.