As has been said, I'd make the images on the main page larger to tease the surfer more and also a blog.
It might just be my monitor though the pics look a little dark as well.
Once you click Join the club, you need to scroll down at least 2 pages to get to the payment options, if you make it so they don't need to go looking it'd probably be better
On the signup page the screenshot of the members section looks basically exactly what I'm looking at (the signup page).
I'd try to change the structure of the homepage to be multiple pages so they can see some of the freebies on one page, desktops on another etc. If you also show thumbnails of some other pics from the series it might help to drag them into the join page... you should probably link them to the join page as well.
Nice looking girl