Lately Google is experimenting new ad-formats and ad-styles to attract more clickers to its Google Adsense advertisements, while testing my website in Apple Safari 4 Beta it displayed a new experimental ad-format named "Interesting Items by Google", the advertisement module displayed an RSS logo with links to an completely untargeted recipe website as shown below.

The new ad-format seems to pull related RSS feeds and display them in the module, but in my case it was way off-target displaying recipe ads, this is still experimental and the targeting should get fixed once this is rolled out to all users and publishers.