Great stuff! I think you may have the D&D Gazeteer and the Living Greyhawk Gazeteer the wrong way round. I'm pretty sure the slim D&D Gazeteer came out first.
Thanks for that Reveille. I wondered where I got my previous version from. It has come in handy to see what books I had and what ones I still wanted to get.
Now if I can just figure out where I downloaded the Excel spreadsheet entitled "Compiled Index of WotC Material" from. It lists all the Base Classes, Prestige Classes, Feats, Spells, Monsters and D&D Minis that WotC has released (at least up until March 07, when I downloaded it). It's proved to be very useful and I'd love to get an updated version if someone has one.
Olaf the Stout
Edit: I found it. CMG Mark has it on his site and it was put together by Stephen J. Miller. Unfortunately it hasn't been updated since I downloaded it last.