I have friends moving there is a couple of months and my cousin wants to move out there.
According to an Aussie I used to work with in the major cities the job market is booming because "we haven't had a recession" and although property is expensive, wages are higher (average >£40k/year) and the general cost of living is allegedly lower.
Worth noting that the aussie dollar has strengthened massively in recent years, currently ~1.57 to the pound compared with 2 a couple of years ago when I went, and 2.5 not long before that.
So overall I'd say unless you want to take a load of money out of Britain and get shafted on the exchange rate, it looks an attractive option.