Hmm, great idea. We could build on Git as a storage medium, and we'd need a durable and reliable way to exchange patches. Something like ...email?
$ man -k patches
git-am(1) - Apply a series of patches from a mailbox
git-format-patch(1) - Prepare patches for e-mail submission
git-imap-send(1) - Send a collection of patches from stdin to an IMAP folder
git-send-email(1) - Send a collection of patches as emails
Ironic that you're pondering Git as a solution to Github's self-created centralization problem.
