A thing that has amused me since last week is this great animation and song [Flash alert, but worth the loading]. There's also a page with the Flash version and the songtext and one with two versions [original and radio edit] as Quicktime .mov. The radio edit is worth watching too.
Another great animation with neat soundtrack is Drum Machine.
I recently found the Rotten.com library. I always thought Rotten only hosted digusting pictures, but apparently they host quite a slew of amusing [yeah, really nice] stories too, from biographies through hoaxes and conspiracies to cryptozoology. Interesting.