Cartoons I laugh/cry at:

Something Positive
H4x0r Economist
Get your war on
Spamusement
Doonesbury
Heart of the City
The K Chronicles
Hark! A Vagrant
Rosie Dee
This Modern World
Tom The Dancing Bug
Dilbert
Foxtrot
Perry Bible Fellowship
Cat and Girl
Hyperbole and a Half
xkcd
The Oatmeal