Sparky, at this point in the game, WA is the only State where Betfair is illegal, although all of us in Australia are barred from in running betting unless it's over the phone - which is pretty much useless
If we had in running betting, I don't think I'd ever have a losing trade and I suspect that that's the piece of the puzzle missing from the armoury of the successful traders, rather than being able to "predict" market movements.