You replied to my parenthesis, not the main comment.
If you don't even want a mailing list or anything like it then the fact you can create a google group is not helpful, especially if you'd have to moderate it or let it drown in spam.
If you want to do a code dump somewhere public then GitHub is a reasonable choice. Yes, "social coding" may make you cringe, and it might be full of brogrammers commenting for the lulz, but its UI is far superior to e.g. SF.net, Google Code or Gitorious (I haven't tried Bitbucket because I don't much like Confluence or Jira, they're inferior proprietary copies of decent software.)
Don't get me wrong, I'm not a GitHub fanboy, almost all my FOSS work is done on mailing lists and I'd prefer to see Gitorious improve to the point where it matches or exceeds GitHub's features and ease of use. I'm just trying to respond to "What's wrong with sending pull requests to e-mail list?" as you seem reluctant to accept that might not be the best choice for everyone.