MultiLevel source mapping in Chrome

Pretty amazing stuff the chrome developer tools team is doing, you can go from coffeescript down to minified js in the browser. This allows you to view coffeescript in the browser via the source maps but really there is minified js running in the browser.

The Breakpoint Ep 3: The Sourcemap Spectacular with Paul Irish and Addy Osmani
http://www.youtube.com/watch?v=HijZNR6kc9A&feature=player_embedded