Github or Google Code? Local backup or mirror?

olikraus:
Any news about this thread:
http://arduino.cc/forum/index.php/topic,73531.0.html
Shell we all migrate to github with our libraries?

An interesting read. It certainly makes sense to have one place to house all the available libraries. My projects include hardware, though. I don't think it would fit under the library repository. I have an account on GitHub and an account on Google Code. Incidentally, when I tried to play with it both sites were down for maintenance.

Does GitHub support a wiki or any king of mechanism to provide information outside of then repository? I have visited quite a few projects hosted on Google Code. So I know the wiki available there.