Gambling Nation and the Church's Bingo Problem

Sports Illustrated has taken note of the dangers arising from our nation's poker obsession, especially among young people.  States have become dependent on lotteries, and casinos dot the landscape.  Growing up in an evangelical household where even possessing playing cards was frowned upon, I was always under the impression that Catholics fully embraced gambling given the number of bingo advertisements plastered on local parish halls.  In fact, one easy swipe at Catholics was to label them as more concerned with bingo than with spreading the Gospel.  I know that times have changed (I think), but I'm not sure whether the Church has staked out an official position on gambling, so I'll ask readers and co-bloggers: What does Catholic legal theory have to say about America's gambling obsession?

Rob