Great stuff from Hayden and Ponting thus far, a win is on the cards but remember, no other team in the world collapses quite like Australia. Doesn't matter what form of the game, or the composition of the team, there will always be a period in an innings where there will be at least 2 or 3 wickets falling in quick time.
Would be quite a feat to record the highest ever total to win in a fourth innings given how long the record has stood and the fact that they were given only two sessions to do it.