Personally, I like the Sex Comixxx idea for several reasons:
1) No copyrighted characters of other companies to get your butt in a sling
2) More creative options (I have several ideas for adult comics including one with a shemale amazon with a cat-woman sidekick lover)
3) Original content (many surfers are tired of seeing X-Men over over)
4) I would, however, like to see more non-anime adult stuff (something from DC, Marvel or Image). I've never been a big fan of anime-style art.
Just my four cents
And the site looks pretty cool...