As long as we're linking stuff, I'll do it too! Here's a post I started a little while back about Responsive Design and AdSense:
All my sites are going into responsive design now. But for the sites with AdSense - the bottom line is, I'm not happy with the way it works. If you know how to code, you can maybe write something that substitutes a mobile ad unit when it detects a mobile browser, but responsive design is based on viewport, and I don't think I can detect viewport with PHP. I am looking at several possible solutions, but probably won't have time to test and implement before my peak season hits.
So for now, I'm serving responsive design for everything down to a tablet size, and using a mobile plugin for smartphones.