I stumbled across this article today while searching for some advice on ways to make quick cash off tradeskills.  Instead of being a simple "make Titansteel Destroyers" type of thing, it's a detailed analysis of the Great WoW Depression (which I hadn't even noticed) and the real world one (which I kinda had noticed). It's a fascinating read, even if you don't play World of Warcraft.

http://greedygoblin.blogspot.com/2009/04/deflation.html