Some interesting baseball poll results at gallup.com. While the proportion of Americans calling themselves baseball fans has been steadily falling, gate receipts have been steadily rising. In marketing-speak, it appears the "passionate minority" is fueling the sport's growth, which is not necessarily a bad thing, but you never like to see the general interest in your product declining.
I'm reading a book on the sociological characteristics that define twentysomethings and one could argue it doesn't bode well for baseball. I may expand on that some other time. Right now I am hungry.
Lots here on a variety of topics if you like polls.