You can also pick up a domain name and point it at your github repo. I've got wickerbox.net for $10 a year from Namecheap being served out of wicker/wicker.github.com. One of the neat features is that any time you do put in a gh-pages branch in one of your other repositories, it's accessible by wickerbox.net/name-of-repo.

Thanks for writing this, swanson. I've written on and off over the last few years but lately I've wanted to write, started to write, and then lost the nerve and never posted. Hearing "you don't have to be the next Joel On Software" helps.