Amaztype

http://amaztype.tha.jp/

This link is so much fun. I've been playing around with it for going on 20minutes.
It's really simple:
Type in a word that the site will search for on Amazon.com (for example: love)
It will then create that word (love) out of books that come up in the search (love related books).

It's sort of like just doing an Amazon search for a keyword, but instead the search results come back in a fun shape. If you pan your mouse over the letters created by the covers, it will highlight the books on top and give you some of their information. If you click on the cover, it will open a window to that book on Amazon.com