Similar to myspace... Have a section for comment to the photographer... Have it under the about me or even at the very bottum of the porfile page. I am not sure if this is a good idea but I thought I'd through it out there...
I dunno, that idea came to me at some point. Afetr thinking about it for a bit, I concluded that it wouldn't be good because it would risk bringing dpc closer to a social networking site. It would be just like a facebook wall.
Good point however I think it might draw more money paying members... Maybe it could be looked over by SC but then again maybe that would be just one more thing that SC has to do... I don't know if it would be a good idea... I'm just tossing ideas in the air...