[EyeballKid]

Penny Arcade have been running a public information campaign on punctuation for a few years now...

http://www.penny-arcade.com/comic/2003/07/07

(and http://www.penny-arcade.com/archive/results/search&keywords=... )

[jasonwocky]

My personal favorite has always been:

http://www.penny-arcade.com/comic/2005/09/02

Definitely a pissed-off period.

[sukuriant]

above link is NSFW

Did not know that when clicked.

[jasonwocky]

apologies