Some of my favorites...
One of the best sites that link to interesting stuff http://www.fark.com/
And cant forget their sister site http://www.foobies.com/
And you cant forget kindgirls http://kindgirls.com/archive.php?p=2
For those who miss college or just want to know what the girls are doing when they're at college http://www.collegehumor.com/
For those who like airplanes...and what happens when they dont fly the way they should http://www.micom.net/oops/