This blog describes the explorations of the most excellent module, "The Castle of the Mad Archmage" by Greyhawk Grognard.
THERE WILL BE SPOILERS! SECRETS SHALL BE SHARED! YOU HAVE BEEN WARNED!
What's a good (read: very cheap) source of those bases? The ones I've seen at different boardgame sites are pretty expensive.
In answer of my own question, Rolco Games seems to have them for pretty cheap here.
@Restless -- Sorry I didn't get back to you before you found your own answer. I ordered mine years ago from "Plastics for Games" Rolco looks like a good alternative.