Tomb is a board game that our friend Todd introduced us to some time ago. Lately John has been on a huge board game kick, and we've been able to play a goodly bit of Agricola. Today John and Jeremy ended up with Stone Age and Tomb, respectively.
Its pretty fun. Its very Dungeons & Dragons in mindset. Basically each player is an adventurer, out to bust open crypts, kill monsters, disarm traps, and get treasure. You can recruit other adventurers in the inn, get spell cards and item cards and so forth to help you, and you go out and bust open crypts. It's pretty competitive, and while not directly player-versus-player, it can be pretty cutthroat.