All the affiliate programs he has on his site:

Flirt4free
http://getyourfixxx.com/ CCbill program
TLAvideo
Playboylive.com
cockyboys.com
seancody.com


If he is using your images to draw traffic and then upsell them to other affiliate programs, then they need to know about it. If they chose not to do anything and he continues then they can become liable as well.

It's easy to just CC them all on your Cease and Desist letter to him.