Go already has an established contributing process, and people who make PRs without bothering to understand that process are likely just making noise.
Not that it really matters, right now, as we're in a pre-release freeze.
https://groups.google.com/d/topic/golang-dev/sckirqOWepg/dis...
I like e.g. https://trac.openstreetmap.org/browser/chef
https://hg.python.org/cpython/
Another interface I prefer is:
IMHO it's an error, but I am not a core python developer
I like Bitbucket's side-by-side diff view so much, that I think I prefer Bitbucker for browsing.
But this is only because Bitbucket has the side-by-side diff view, anf GitHub does not.
Allow me to suggest that GitHub is at minimum the most-visited web-based git repo, which means that if you want a lot of people to view and use your code, it's a good place to mirror.