[_joe]

When you people will be able to scale git to accept the number of revisions Wikipedia has, and add several new ones per second with millisecond latencies, please let me know.

Also, only a programmer could think git is a friendlier interface than a wiki.

There are things that are wrong in the wiki comunity, none of which would be solved by using github instead.

Not to point out that the forking model would lead to fragmentation and GitHub is actually a privately owned for-profit platform, of course.