not sure if you're looking for links/sponsors/etc.. but if so..
trafficgigolos has some interesting ones.. at least i thought so. ;)
here are some of my favs:
www.bubblegumdreams.com - girls chewing bubblegum/eating candy while masturbating
www.smokingalone.com - girls smoking cigarettes/cigars while masturbating
www.dildodrill.com - exactly what it sounds like ;)
www.hornytickling.com - exactly what it sounds like ;)
www.lesbianstepsisters.com - interesting concept..
www.ripmypantyhose.com - self explainatory ;)