Link: Sluggy Freelance
When I get into work, the first thing I do is to surf my standard list of links. First up is Sluggy Freelance, a web-comic. It's usually pretty funny, and the stories are suitably detailed and well worked out. It's also a bit juvenile at times, seeming to be designed to cater to the tastes of 13 year old boys.
Doonesbury is better if you're after slightly more mature, and political humour.