Google launched an experimental feature in Labs called Google Image Swirl, which builds on new computer vision research to cluster similar images into representative groups in a fun, exploratory interface.

Lil bit off the track, but Bing image search is also good. Try it too.

Try Google Swirl:
http://image-swirl.googlelabs.com/

I Tested the app with the following, looks impressive and fun:
http://image-swirl.googlelabs.com/html?query=space#523
http://image-swirl.googlelabs.com/html?query=miss%20universe#
http://image-swirl.googlelabs.com/html?query=mushroom%20cloud#
http://image-swirl.googlelabs.com/html?query=chicken%20biryani#315

More news here:
http://www.pcworld.com/article/182404/google_image_swirl_a_handson_tour.html
http://googleblog.blogspot.com/2009/11/explore-images-with-google-image-swirl.html

Any sufficiently advanced technology is indistinguishable from magic.
–Arthur C. Clarke