www.freedigitalphotos.net
Thats what ive been using and its been great! plenty of free commercially available pictures.

Hey Jeffrey. I wouldn't use it. I did a quick check and it's simply a search engine that displays any image it finds that has been described as "free". In it's T&Cs; it has a disclaimer that it takes no responsibility or liability if the image wasn't in the public domain. There are reputable free resources such as http://office.microsoft.com/en-us/images/ or paid stock libraries such as http://www.us.fotolia.com where you can license images for a $1 a time legitimately, or less if you subscribe. Rich.

I've never heard of the site before. With all the legal ramifications involved with using copyrighted images I'd be careful. Thats just my opinion, I really don't know much about it. Hopefully one of the more experienced members will chime in.