I'm currently a pixel artist in the game industry, working on a game for the Nintendo DS (I work at Big Blue Bubble in Canada...if you're a pixel artist, need a full-time job, and can move to London, Ontario (yeah, I didn't know there was a London in Ontario either), toss a resume to jobs@bigbluebubble.com because we're hiring). The last tutorial update was Chapter 11, and I've learned a lot since then.
Also has tons of info about being a pixel artist...
Every time you make a character based around perfect 8 direction angles, a kitten is stomped. A cute one. That belongs to a mischevious but loveable orphan. Who has no arms.