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.