Ann Smarty - aka SEOSmarty - has written a great overview of image search. If you look for images online this is well worth a read to hone your searches and find the right engine for you.
The article gives insights into filters, tagging and how best to use these features to really find what you are looking for. Ann's has great expertise in this area and there are other posts about image search worth adding to your must read list.
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!