The A.F.L. still does things the old-fashioned way, because it's so unlikely that a game will end in a draw. Apparently in 102 years of competition there have only ever been 3 drawn Grand Finals. Though they hastily created a new rule on Monday allowing for extra time time in the Grand Final replay if that should end in a draw, too. Incidentally, the last (and only, I think) time St. Kilda won a Grand Final, it was also agaisnt Collingwood - and they only won it by one point.
Meanwhile Melbourne's kind of been thrown into chaos by this whole rematch thing. The Grand Final is such an unimaginably huge day in the Melbourne calendar that basically nothing happens on the Saturday on which it's held - which means that a lot of things are planned for the Saturday after. Now all those events - hundreds of auctions, weddings, anything else you can imagine - have been postponed because everyone will be watching the rematch.