<<There are reports at both DigitalPoint Forums and WebmasterWorld that Google AdSense is testing a new ad format. The new ad format has "featured ads" within the ad units, with little yellow stars next to them.>>

http://farm3.static.flickr.com/2555/4115020426_3a02c42482.jpg

http://www.seroundtable.com/archives/021185.html

Same site, AdSense related:

<<The link at the top right is in red and says "Try new AdSense." When you click it, it takes you to https://www.google.com/adsense/enablebeta and then redirects me to https://www.google.com/adsense/v3/app. I believe you need to be added to the beta to gain access, but those are the URLs.>>

More Screen Shots of Google's New Beta AdSense Interface
http://www.seroundtable.com/archives/021187.html