According to Gamestop, the next iteration of Madden (Madden '09) will allow players to have do-overs. The Rewind feature must be agreed on by both players, and will allow you to reverse any play, even the other guy's. Player may select 0, 1, 3, 5, or unlimited rewinds. They are not available for online games.
I'm a purist, and while the chance to take back my own mistakes has a certain allure, the idea of my opponent nullifying my awesome play is not good. Do. Not. Want.
But what about you? Whaddaya think? Good idea or tool for ultimate evil?