Well, here's what Philip came up with (i.e. what's currently on the photo.net "Terms of Use" page):

"Ownership of Submitted Material. You retain the copyright to material that you submit to any of our forums, chat rooms, image critique areas, or photo sharing systems. However, by submitting the material you grant photo.net a perpetual non-exclusive world-wide royalty-free license to modify, publish and reproduce that material for the purpose of operating, displaying, distributing and promoting photo.net."

The worrisome aspect of this is that photo.net retains a license to *modify* our material. I'd be more comfortable if the language included a promise to give attribution and not alter posts.