I am currently working on transferring all of my saved bookmarks to delicious and tagging them properly. While doing so I stumbled upon two of links that could be interesting to you if you are currently thinking about creating your own setting or campaign:
My own Dungeoncraft column was inspired by Joshua Dyal’s “Diary of the Birth of a Camapign Setting” but I think he has done a much better job than I did. And Ray Winninger’s Dungeoncraft essays are a classic. In my opinion every GM should have read them.