The minor-league Bowie Baysox have a new system that allows patrons to order food and drink using their cell phones and have their order delivered without getting their butts out of their respective seats. They even have a jingle to go with it: "Take me out to the ballgame. Take me out with the crowd. Order me by cellphone, PDA, or cell modem some peanuts and Crackerjacks..."
I used to complain about people getting up for food in between, and sometimes during, innings, but at least they get a little exercise during the game. If you've ever seen a game at Camden Yards, you'll notice that no one sits for more than a half an inning at a time.
I do have to say though that there is nothing quite like the rubberized hot dogs and watered-down swill that passes for beer being ordered using leading-edge technology. Especially when it still costs more than your average dinner for four at the Russian Tea Room.