One thing that Tiger has not started doing yet on Australian domestic services is Flight Combos. Maybe they will time flights through ADL to allow combos like Canberra to Perth. This would help them if they find that ADL-CBR traffic is not as strong as they hoped.
If Tiger allowed people to do Web check in and if they allowed people to have 10kg carry on bag limit so that there are not bags to re check Flight Combos would be easier to do on the Australian network than on Asian flights where people have to go through Immigration services.