It's actually called Settlers of Catan and it's a great game. I've often thought playing games in the tub would be fun but the last thing I'd want to do is ruin the game because some of the pieces got wet.
Most of us are familiar with Monopoly and Risk. Frankly, they are pretty boring when compared to other games that are out there. Settlers is a personal favorite, as is Carcassonne, Ticket to Ride, Havoc, EuroRails and Elfenland, to name a few. These tend to be more strategy games and they also tend to lack the "boredom at the end of the game" often seen in American board games. The definitive source for info on virtually any board game ever invented is here:
http://www.boardgamegeek.com/Jim