Black and white street photography by Markus Hartel

http://www.markushartel.com/

xkcd

http://www.xkcd.com/
A webcomic of romance, sarcasm, math, and language (by Randall Munroe)

Unfortunately, it's best viewed using Internut Explorer.
(You might want to mouse over the images.)

The Webcomics Examiner

http://www.webcomicsreview.com/
From the Webcomics Examiner Mission Statement: "The Webcomics Examiner is a forum of frank, sophisticated discussions of webcomics as a fine art. We strive to identify the boldest, most important new works, and to advance the dialog of what these works mean and why they matter."

The Straight Dope

http://www.straightdope.com/
Fighting ignorance since 1973.