deadsea, I agree about image search, it's close to useless. I'm not talking about targeting image search, I'm talking about targeting regular search with image pages. Some people scroll past the image search and click on the regular listings, even for keywords that are clearly image searches. What they're looking for is a gallery of images related to their keyword, not just a bunch of single images lifted from random sites.
This traffic can be much more useful than image search traffic.