Link dumps work well. Posting on adult forums works too, but just dont post spam on forums, they usually have lots of mods that love to delete the junk...just add content and maybe include a sig link or a link back to larger pics on your site? Good luck
When I add a site to stumbleupon.com i am asked if it is an adult site. I have no experience with adult sites, but you might want to see if they have an adult section