http://creativecommons.org/image/ (Click the two check boxes including "I want to use the images commercially" when searching.)
http://openphoto.net/
Need photos
Moderator: General Moderators
Corbis definately has some good photos. Just registered to check it out. But it is pretty expensive stuff. For some they don't even give the price. First you have to select a massive amount of dropdown options and choices, and then they tell to send an email to the owner to ask for the price... maybe some day if i'm rich 