Bannerstake

This is a very cool service that allows you to enter a search term, then see banner ads from various major search engines that appear in response. It’s a fast way to see who is buying keyword-linked ads across the various services. To use the service, look for the “Bannerstake” section on the lower left-hand side of the home page. Thomson & Thomson, a trademark and copyright services firm offers the service.

http://www.bannerstake.com