In the ICC World T20 Australia lost its first game to an unfancied West Indies
Next Sri Lanka defeated Australia and thereby eliminated them from the tournament.
As Ricky Ponting said after the game Australia have now lost five international T20 fixtures on the trot . Well short of world champion standard.
No excuses: it's clear that our national team just hasn't adapted to the new format which even purists like me have to acknowledge has its own appeal. The 20 over a side format means that upsets (eg England's loss to the Netherlands ) are more frequent but class should still trump good luck most of the time (even if Ireland seem to have ridden their luck and that of their draw well enough to move on to the next stage).
Results from Cricinfo.