This seems like a cool idea. You might want to check with a lawyer about the logo up top though, thats definitely GitHub's octocat hiding behind Apple's Terminal.app logo.
I forget where I read this, but it was someone asking the same thing. I might have been on HN, actually.
it would be a nice way of everybody having a common "icon", much like twitter has the bird.
I know people can link to github, but that's not always possible (mobile apps?) even though people use github..
I think a good solution would be a new open license logo, like the Minefield logo as opposed to the restricted Firefox logo.
We'll get on that ASAP. Nothin' but love.