tough to say what to do. Your reputation is important, so you dont want to come across as mean. On the otherhand, they are your images. I'd call him and remind him that reproduction of those images is prohibited without your consent and ask that he take them down. He paid for the shoot, and the proofs, but not for the rights to advertise, or republish the shots on the www . . . You still own the rights to them, he just purchases a few proofs, but he did not purchase the rights to reproduce them. did he credit you on his website for the photos?

That said, you may just want to chalk it up to a lesson learned, dont let anything out of your hans without a copy right splashed across the face of the image. . .

I would be very mad about it, but I would also keep it in persepective. People who cheat like that cheat like that!