Dilbert
The official dilbert website featuring scott adams dilbert strips, animation, mashups and more starring dilbert, dogbert, wally, the pointy haired boss, alice, asok, dogbert's new ruling class and more.
http://www.dilbert.com/
Managementstrips
Ace! - posters, strips, white papers)
http://www.ace-management-partners.nl/alg/informeel.htm