This is the sort of item I feel morally obligated to pass on. Pied Piper Publishing has released a new module for the original version of Advanced Dungeons & Dragons, written by Rob "Robilar" Kuntz and illustrated by James Holloway. Called CAS1: Cairn of the Skeleton King, it is suitable for parties levels 4-7 and looks totally retro-awesome. The Pied Piper site is down as I type this, but RPGnet has a favorable review and copies are floating around eBay. If I still played with any of my old crew from high school this would be the perfect type of thing for a one-shot.
"Man, is there anything Jeff CAN'T do when it comes to gaming? This guy is like a critical 20 every roll. Jeff can bite the heads offa five game geeks, including their sorry-ass DM, and spit 'em into a large duffel bag ONE AT A TIME!...that's just the kind of messed up bastard he is! You think yer a gamer, punk? Well..do ya? Jeff will depants your weasel-ass right in front of your grandma."