25 Free Stock Photo Sites / Phil Bradley's weblog, 22 July 2008
http://digbig.com/4xfts
"Useful article from Digital Image Magazine annotating 25 Free Stock Photo Sites Most of them were familiar, but there were one or two that were new to me. It's worth reading the entire article for the overviews, but I'm listing the engines below in case you just want to jump in...."