So what webcomics do you all read? I've seen plenty rise and fall over the years, but these are the ones that are still around I like.
Saturday Morning Breakfast Cereal - Kind of science-y
xkcd - Also kind of science-y, with more computer stuff
Order of the Stick - Has a D&D theme, currently undergoing renovation so give it a few days before reading it from the start
Manly Guys Doing Manly Things - Just read the title
Penny Arcade - If you've never heard of Penny Arcade or read webcomics, probably start here. Sometimes strays away from gaming for a few strips, but comes back.
8-Bit Theater - Based on Final Fantasy 1. It's now completed but still on the web.
Concerned - A side story to Half Life 2. Also completed.
Dr McNinja - JUST READ IT
There are a bunch more I'll re-find every few months and catch up with, but these are the ones I keep up in.