Dart: https://github.com/dart-lang
And lots of other stuff:
[1] https://docs.google.com/document/d/1jVFkZTcYbNLaTxXD9OcGfn7v...
https://github.com/microsoft/ and https://github.com/azure/ to name two.
Well, I doubt that Google Code engineers or project managers had much, if anything, to do with the decision to move the Go project.
Being cautious is one thing, being a sucker for being too cautious is another.
There are things like obvious conclusions.
Go was on Mercurial before so it was already away from any Google own source control system.
How being on Mercurial implies that it was "away from Google code" ? It is in fact hosted on Google code currently (https://code.google.com/p/go/)
PS: Google code supports: subversion, mercurial and even git (https://code.google.com/p/support/wiki/GettingStarted#Workin...)
This is a momentous move for Github, especially with Microsoft moving .NET to Github as well. As someone who loves Github immensely, this makes me happy knowing that my favourite service is going to be around for a very long time.
Kudos to the Github team for well and truly making it as the premier code hosting and collaboration tool for developers and lovers of open source. It only goes up from here.