Go for it! Hell, I threw up some current code on GitHub that's arguably embarrassing (link in profile).

It's not like anybody posting crummy code in answers on stackoverflow is worried about the quality reflecting on them. Or the blog entries that are more or less "I've just learned $technology; now I'm going to tell the world!"

If you've at least got a fully baked project, even if it isn't up to your current standards, you're miles ahead of some of the code people publish.