I was wandering around the Wikipedia today and I stumbled across a blog posting by a member of their board of trustees. It was about wikimedia's continuing decision not to use any form of advertising on their sites, and instead run themselves entirely on donations by the public. This was something I'd wondered about before, and it was an enlightening read:

http://whygive.wikimedia.org/2007/11...s-not-run-ads/

Just thought I'd share, since I'm sure other people have wondered the same thing about the wikipeoples anti-advertising motives.