I started implementing a responsive layout for the Rails guides. I haven't tested it in browsers yet beyond Webkit, but I wanted to get feedback before putting more than a few hours into it. You can check out my changes at:
https://github.com/joefiorini/docrails/compare/responsive
Feel free to pull my fork and try it out on an iPhone. I'm planning on adding:
1) expand/collapse for the chapters within a guide 2) in between state for tablet devices
Is this something that we want to continue on?