Yes, that's actually one of the sites that led to this idea, which in my mind is superior in many cases. For instance (and probably the only instance that matters), we get to leverage the power of Git and Github over just wiki-based editing

Also, I think the organizational style on Github is more suitable for what this has the potential to be.

I would love if I could clone the code on RosettaCode to my machine, add things, and send the change requests right back from the power of the command line. We're both programmers, so of course we know it's doable with code. And I could go ahead and code that script. However, it's not really practical.

Thanks though, you just gave me a new idea for a command line utility (not just limited to Rosettacode's wiki)

P.S., I will add a link to it in the README.

That can be done and should be done. In IRC #rosettacode on freenode and ask if someone of the admins will add: http://www.mediawiki.org/wiki/Template:WikimediaGitCheckout or if you can contribute something to their wiki's sourcecode. It IS GPL, so you will be able to retrieve the code! :)

The shortcomings you mention with Rosetta Code living in Wiki format are some of the same motivations for Ward Cunningham's new federated wiki project.

See: https://github.com/WardCunningham/smallest-federated-wiki