If you have any gay traffic (or female hetero traffic), we have a fetish site that is converting insanely well (1:100 is the overall average; many sponsors are consistently getting 1:50 to 1:80)
www.boysfeetclub.com.
It's very tame compared to some of the others here, but hey, it converts and retains.
Hosted movie and still galleries, other promotion tools available as needed.