I use Mike Bostock's awesome bl.ocks.org service that's very similar. It's great for gists with html/js that you want people to preview, as in: http://bl.ocks.

I use Mike Bostock's awesome bl.ocks.org service that's very similar. It's great for gists with html/js that you want people to preview, as in: http://bl.ocks.org/4331769 http://bl.ocks.org/4331769