I just signed-up with the integration of Analytics and Adsense today. It's a great addition to the already useful information that Analytics gather and display. You can now see what contents are giving you money. I think it's one of the missing links that makes Analytics and Adsense indispensable. Sweet!!!
In case you didn't see, the link is under the Contents Menu.
Currently, only one site can be integrated. Or maybe I just don't know how to do it yet. But at any rate, it's a welcome development and I simply love it! Kudos to the Google teams who worked on it. Keep them coming!