inthestars,
I have a few listed on Gay Wide Webmasters...
http://www.gaywidewebmasters.com/Ad_Programs/
There are a number of porn specific sites, but many gay owned sites have porn star sections... Bad Puppy (
http://www.badpuppy.com) is a great one, so is Chi Chi Clicks (
http://www.chichiclicks.com) Chi CHi feature recognizable stars from their production studio as well as invited stars that play around in their Live and Raw Hotel. I have had a really good response to the Hotel feed and upsells to it.
My two and a half cents ;)
Gary-Alan