I gotta say twistys. Very Nice layout and quaility pics.
The only thing i disagree with is I think they have just a little too much free content. Great for traffic, bad for signups. Personally I would only put 1 or 2 (previews) per niche. or not show pink till my surfer signs.
But then what do I know..lol just an opinion since it Seems to work great for them.