Nice site. I folded a simpler version of that "stacked thing" on the right side: it is very fun and looks very nice even done with cheap standard grade paper (although the depicted version is amazing). The design below-left is likely to be Paul Jackson's, he loves this kind of abstract "snake-skin-like" structures.

If you happen to like origami... These masks are terrific: http://www.flickr.com/photos/origamijoel/sets/1783175/ I started to pre-crease a sheet with triangles to try to do one of these but got tired middle-way. It is amazing the work he does with these.