There was a post about https://showoff.io/ here not long ago. Seems they are doing quite similar things, except showoff.io costs a little. I didn't really compare features, though.
I've been using showoff to develop against the github service hook. I've got a paid account so I have a static url which means I only had to set it up once in github. I use a lot of cloud services and don't bother with a VPS. For $5 a month it's a really simple service that does just what I want.
http://news.ycombinator.com/item?id=2468324