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.
This Year's Premier Digital Marketing Event is #CZLSF
ClickZ Live San Francisco (Aug 11-14) will bring together the industry's leading online marketing practitioners to deliver 4 days of educational sessions and training workshops. From Data-Driven Marketing to Social, Mobile, Display, Search and Email, the comprehensive agenda will help you maximize your marketing efforts and ROI. Register today!