Awesome! I have been thinking about making something like this, but it looks like you did a better job than I would have. Responsive design is an idea who's time has come.
Thanks :) I really think responsive web design and one web is the future of web design. There are some situations where a specific mobile website will be needed, but in the (near) future these will be very rare IMHO.
If you have any cool ideas let me know with a pull request or something.