I just subscribed to On Our Backs, actually, cos I can't find any good free feminist porn online. There is http://www.cyberdyke.net, but you have to pay for that---
Also, I like http://www.ssspread.com. Unfortunately, that's not free either, but I do enjoy browsing the "tour" section. Maybe if anyone in the ocmmunity has a subscription to one of these sites, or any others, we can somehow share login info or something.
Of course, Good Vibrations- http://www.goodvibes.com- has a great free online magazine with a bunch of sexpositive articles as well as erotica with varying themes and sexualities.