Noticed this organisation on Facebook which is designed to get people a better deal on their gas and electricity bills.
They are gathering large amounts of people from VIC to facilitate a reverse-auction with energy retailers. Looks like they're doing well given they have thousands of fans already!
Appears to be completely free to the consumer. They will likely receive some sort of sales fee from the successful retailer but will remain impartial by not accepting differential incentive structures.
Disclaimer: Other than helping you all out with potentially some $$ saved, I went to uni with one of he reps so would like to support his initiative.