Watches - Find, Compare, and Buy at Shopping.com
This is impressive. I found it via a blog I read. They've built a very rich data model for common objects, such as watches. Given this extensive range of attributes there are many, many ways to filter thousands of items to find the handful one wants. Building this must have taken a great deal of work, though some was done by parsing text descriptions.
This needs some evaluation. For buying watches there's no beating it. (There are THOUSANDS of wrist watches out there.)