Heya, I know this is an older post, but I was having this problem, too.

I use Snipt (http://snipt.net) now for hosted code coloring, and it's pretty damn spiffy.

http://pkarl.com/articles/introduction-git-version-control-you-and-me-os-x-1/

I just had to paste my code into a box & pick a syntax. They give you an embeddable script tag.