Costco Petrol just opened today in Canberra, should bring some relief to petrol prices in Canberra since we pay around 20 cents a litre more than Sydney and Melbourne. In fact the prices are on par with some WA regional areas.
The Woolies price does require an EDR card with a 4c voucher, otherwise it is $1.33lt for unleaded.
EDIT: They just lowered to 130.7 a litre now for regular unleaded.
Saw a picture from somewhere in America which had the equivalent of $0.55/L AUD.
If only it was that cheap.