From over at Kobold Quarterly, there has been a wonderful series by Greg Oppedisano and Clinton Boomer on the economics of the typical D&D world.
But wait, you say the economics of the typical D&D world make no sense? Exactly.
Here's Part 1, Part 2, Part 3, and Part 4. Enjoy.
More later,
Update: Annnnnnd..... One More.