Google announced they have a new labs feature that allows you to find similar images using Google Image Search. To do so, go to similar-images.googlelabs.com and give it a try.

I thought I try searching for danny sullivan to find similar images. The first image is this one:

Attractive, eh? 😉

In any event, lets see what Google Images considers similar to this picture of Danny. Clicking on the similar images link shows me these images:

There are some guys as well.

Here is a video on how this all works:

Forum discussion at WebmasterWorld.