I've created a project on Google Code Hosting. It's really just a place for me to put code I'm playing with so that it's version-controlled and accessible anywhere. Right now it has a simple command-line draw-the-high-card game that I'm using to try to learn Ruby.
While there may be valid reasons that Google Code Hosting isn't good enough to really compete for hosting real open-source projects, for my needs nothing beats the no-barrier-to-entry factor here. If nothing else, it's nice to have a proper SVN repository available to me for free.