Great project, thank you! Another alternative that was suggested above (that looks a bit better, in my opinion) is Shariff: https://github.com/heiseonline/shariff

They are different in the way that SocialSharePrivacy uses the actual badges while Shariff uses custom elements that link to the social network pages.

That's true, SocialSharePrivacy loads the script after they've been requested, which is the much better way to do this (if you're going to).