The one in that pic is a RAAF bird. It 'lives' about a 30 min drive down the highway from my place at Amberley AFB.
They are still used as frontline combat aircraft down here, though their age is starting to tell.
BTW, I agree, for high speed ingress/egress at stupidly low altitudes and capability to deliver it's (very large)payload on target every time, you just cant beat a 'Pig'. Nothing comes close except maybe a pair of Tornados.
The big question is, what do you replace an aging fleet of F-111s with, and retain or improve it's strike capabilities and range?