So u didnt end up going. Fark. For the next flight, shop around with Virgin or Jetstar etc and organise for more baggage in the cargo hold. What a waste of friggin money.
When i flew to Adelaide last year with Tiger, I missed my flight due to lateness etc, but the super good looking check in girl just booked me in on the next flight without any charge $. The service that day was excellent. But i learnt my lesson and always get to the airport early, cause I dont think I will be that lucky next time.