The RPG Blog Carnival’s idea started with Johnathan of The Core Mechanic (Although Geek’s Dream Girl used to do it too):

Initial Idea (Subject: Resurrection)
Roundup

Then Donny the DM took up the torch

This is Homebrew
Roundup

This month I offered to take up the torch and reinforce a nascent RPG blogging meme that has cropped up in the last [...]