There are a *lot*of women readers at places like Fleshbot and
Eros Blog. It's not that women don't want hard-core porn -- many like it -- but funny thing, they don't seem to enjoy the female-negativity that permeates so much porn marketing. I've got sites with tons of female traffic, and the only thing I do different is avoid heavy use of the sluts/bitches/hahahahas/whores marketing jargon that's so popular with the guido pornographer crowd.
(I think that porn-for-women-site mentioned up-thread is at sssh.com.)