What tech is used to build your favorite site?

Find out with Builtwith.com. It scans a site and guesses how the site is built. I ran it on this site and it said: Apache, Windows,  PHP, Adsense, RSS, CSS, Javascript, and UTF-8 encoding. Correct, yet I think it should have guessed Drupal was the CMS and it should have been able to determine which AJAX library is used. Though it's kind of cool to see which sites use PHP and other technologies.