Virtual hosting blog: Webmaster Intel Basics: 25 Tools to Compile an In-Depth Dossier on a Competitors’ Site

http://www.virtualhosting.com/blog/2007/webmaster-intel-basics-25-tools-to-compile-an-in-depth-dossier-on-a-competitors-site/
"Your rankings don’t just depend on how good your site is. They depend on the quality of your competitors’ sites as well. As a result, keeping an eye on your competition should be a regular part of every webmaster’s tactical plan. Use these 25 tools to get the lowdown on their sites."