Everyone likes comics. Post any you think are good.
The obvious one that everyone who reads webcomics must (or should) know about.
http://www.penny-arcade.com/
Probably less people have heard of this one, but its been on the web for 5 years or so now.
http://www.somethingpositive.net/
Some of you may have heard of Phil Foglio. He's a great comic artist, and used to do actual comicbooks. This is his first webcomic. Its really good.
http://www.girlgeniusonline.com/
This comic is pretty new, but the art is good, and the story looks to be quite cool
http://www.thezombiehunters.com/index.html