I remembered a few Dungeon adventures I used for an Eberron campaign: "The Styes," by Richard Pett from Dungeon #121 (Apr 2005), and "Murder in Oakbridge" by Uri Kurlianchik from Dungeon #129 (Dec 2005). The first one is just dripping with Lovecraftian atmosphere, but required some work to bring to the table. The second I could run pretty much as-is -- it was a nice, contained mystery.