Heya, Gary,
Glad to hear you're feeling better, please accept my best wishes on your continued improvement!
Now, as a point of general interest, I read a post by one of your OD&D campaign players on Dragonsfoot, where he remarks that he and his fellows have actually managed to rout (if not completely crush) the Old Guard Kobolds on the first dungeon level of Castle Greyhawk. I was wondering if you had any comments on the matter (praise for the players, lament for the ruin of the OGK), and if you had entertained what menaces might now come to fill the void left by their passing...