Distributed version control is such a wonderful thing. And, I love how github has become a pseudo-wiki - letting individuals change information, knowledge and not just code. Naturally, HTML/HTTP is graph-like, but unfortunately it has converged over time into a few homogeneous master branches, owned and controlled by a few. I hope that techniques like DVCS with its branching, forking, and merging of information, can create better Wikipedias.