I already read a lot of webcomics, but I'm always trying to find more that are actually, you know, good. Here are the five best webcomics I discovered in 2008:
Pictures for Sad Children
One of my all-time favorites, it's best read in order. The same artist is also currently drawing a comic for every hour he's awake in anticipation of Hourly Comic Day.
Daisy Owl
A low-key comic about an Owl, his adopted human children, and a Polar Bear. Also best read from the beginning, although it's a bit slow to start.
Bellen!
A feel-good relationship comic you can read in no particular order. I especially liked this one.
Beartato
The various adventures of Beartato (a bear + potato) and his friend Reginald. Mostly absurd one-offs.
Kate Beaton Comics
Actually from December 2007 or so, but I can't think of anything else really good from this past year. She's best known for her History Comics.