Repo.js
darcyclarke.me
darcyclarke.me
I can see this being useful in tutorial articles to allow the user to see all the code involved at once.
I already built a couple Github jQuery widgets that people in this thread might also find relevant: http://www.joepettersson.com/demo/pretty-gist/ http://www.joepettersson.com/demo/jquery-github-widget/
I would recommend allowing one to set a max height. It's rather impractical to have a 200px tall box turn into an enormous box with 500 lines of CSS.