Heh, I have an unhealthy addiction to webcomics. Seriously, it takes me close to an hour to read through em all each day, and I keep finding new ones. I'll just give you a few of my more favorite ones:
http://yirmumah.net/
http://www.uglyhill.com/index.html
http://pvponline.com/index.php3
http://leasticoulddo.com/index.php
http://www.ctrlaltdel-online.com/
http://www.sorethumbsonline.com/
http://www.robandelliot.cycomics.com/index.php
http://www.wondermark.com/
These are just my favorite of my favorites. If you want, I could PM you with a more complete list.