This is just a list of webcomics that I check on a regular basis. I just got this site up and it's the only thing I could think of as placeholder that someone might actually find interesting.

Every Day

PvPonline.com - Hosted by SPEAKEASY.NET
Questionable Content
Our Valued Customers
SMBC
Darths and Droids

Monday/Wednesday/Friday

Penny Arcade! - Definition Theatre
The Adventures of Dr. McNinja
El Goonish Shive
XKCD

No longer check

Dominic Deegan: Oracle for Hire
Finder's Keepers
VG Cats - Updated Mondays
No Need for Bushido!
Tales of Pylea
The Zombie Hunters - Updated on Mondays!
MegaTokyo - relax, we understand j00
DMFA
Nuklear Power - Home of 8-bit Theater
Erfworld
Commissioned
Axe Cop
Seraph Inn
Applegeeks 3.0
Zap!

Monday/Thursday

Looking for Group
Multiplex - Updates Every Monday and Thursday

Other

Exterminatus Now
Come heave or not at all
Giant In the Playground Games
Goblins - Life through Their Eyes