I quite enjoyed the browsing experience on dropr.com. It’s pretty varied and deep. I really love the animation on the home page and very much like how the pages change up as you go through the content. There are also lots of little surprise interface details here and there to keep you engaged. I think this site rides the line between being intuitive and experimental though, but keeps it close enough to usable to be a great experience.
Plus, bonus points for the awesome ASCII art in the CSS!