I'm the creator of a popular web RPG called Forumwarz (
http://www.forumwarz.com). Over the weekend, I decided to try a small project using Gosu and Chipmunk in Ruby. I was surprised how easy it was to get something up and running. I was doubly surprised at how well it performed.
Here's a video of the gameplay test I put together. The framerate is much smoother than it is in the video, but you can still get an idea of how it looks:
http://vimeo.com/4944993I've also attached a screenshot.