Last year at GenCon Joseph Goodman premiered the Dungeon Crawl Classics campaign setting (written by Harley Stroh, Mike Ferguson, and myself), which was a monster-sized boxed set that was about $80. We did some signings at the Goodman booth and it was all very exciting.
This GenCon he's premiering a boxed set, Castle Whiterock, which can eat the previous boxed set for breakfast. A $100 monster dungeon. My only part in this was detailing the region in which this castle is situated. Still, it's pretty exciting. This thing is going to be a friggin' weapon; it could probably stop a bullet.
Rumor is, Jeremy Simmons had to call upon both the Greek and the Nordic pantheons in order to channel his map-making skills into this thing.