I LOVE the new instant replay rules in MLB. Baseball definitely needed something to make the games last longer.
Another idea might be to allow the batter to change batting gloves after every foul ball. Think of the revenue that could be generated from the sale of those "game-used" gloves. And the time it takes to change gloves would give the announcers more time to talk - which they obviously need.
That would lead easily into unlimited trips to the mound by the pitching coach. (Unlimited = the number of time outs allowed in a college basketball game.)