Bondage:
http://www.darksites.net/top100bdsm (bondage / extreme only)
Horror:
http://www.darksites.net/top100sn (horror-porn only)
Also, if you link to
http://www.weirdandsexy.com, it'll act as a toplist. My top referrer program will catch your incoming hits and post your site on WeirdandSexy based on incoming hits all the way to #75. The top 15 sit on the top right of every page!
Good luck!