I am currently setting up another site and I need picture galleries. I never have problems getting movie submitters thou, strange. I am going to build this site the same way I built dansmovies.com so there is some serious traffic going to the galleries since none of my traffic goes to trades.
Feel free to post as many as you want as long as they are good quality.
http://www.dailysamples.com/cgi-bin/agsql/submit.cgi