Okay, this is the FIND OF THE DECADE for me, as someone who needs a lot of "stock" photography, without wanting to pay the ~$2500/yr costs of stock photo sites.
http://pirc-bw.com/free-photos.html
^^^ That site links you to a number of sites that deal in royalty-free, commercially-allowed photo libraries.
A couple of the sites require small costs for certain photos, but the greater majority of the photos (especially the ones without people in them) are free as a bird, and aren't just shitty cameraphone pictures, either.
IDK how many of you even work with photos on a commercial scale, but ohmygod I have never known such relief in my life to have these sites you have no idea omg no idea.