B3TA - Madness, brilliance and insanity. You can spend hours watching the B3TA messageboard.
Pipingrad.com - Some second-rate artist's old site.......dunno why I'm mentioning it......
Comic Art Community - A great source of comic-book imagery
Penny Arcade - The world of games and related pop culture presented in a 3-panal format.
Corbis stock photography - MMMmmmmm..........reference.
Red Vs Blue - If only real war was this funny.
No Pink Ponies - Webcomic, the artist of which (Eisu) has nailed facial expressions.
PVP - Another legendary web comic. Dunno why I hadn't posted a link to it before now!
Chris Phillips - Fellow cartoonist. Really nice 'n dynamic stuff.
Underspray (Interview) - Feb 2007. There's a number of great artists here you might want to check out.
Jack Lawrence - V.talented British artist. He draws great monsters. Very slick. He has a D.A page, too.
Zero Punctuation - The greatest games reviewer of all time.