Humorous Incidents
From a long time ago: The Chronicles of Navero--slowly being translated into Wiki format. The (AD&D 1) adventures of a clumsy priest and his erstwhile (heh) companions.
The Adventures of "Team Zed" - an Internet classic. You can find them in the Google Archives here, here, and here.
Funny (or just sad, depending...) RPG stories in a science-fantasy setting:
(On the off chance that you're in my Gaming Group in Marysville, CA - Don't read these yet, they have spoilers.)
When GMs improvise: The Hummingbird of Death.
Setting the bar for Monty Haul.
Death of Flaming Toad Spit.