Philipp over at Google Blogoscoped points out that Google is testing placing few thumbnail images from their image database at the top of web search results pages. I tried a few searches but wasn't able to see any examples. Luckily, the GB post also includes a screen capture.
Btw, embedding a few thumbnail images directly onto a page of web results is not a new idea. Ask Jeeves has done this (if the query indicates the searcher is looking for images) for almost two years. Here are a couple of examples from AJ:
+ images elephants
+ pictures golden gate bridge
Meet Your Favorite Search Engine Watch Contributors
Many of SEW's leading expert contributors will be at ClickZ Live, the new online and digital marketing event kicking off in New York (March 31-April 3). Hear from the likes of: Thom Craver, Josh Braaten, Lisa Barone, Simon Heseltine, Josh McCoy, Lisa Raehsler, Greg Jarboe, Dan Cristo, Joseph Kerschbaum, John Gagnon, Eric Enge and more!