For some reason I thought that their announcement with the big mac index example meant that their system would automatically adjust pricing to the equivalent US dollar amount (based on that day's exchange rate) and then multiply it by the big mac factor... in other words wring more $ out of non-US surfers who pay more for their big macs. When I go to setup it looks like I need to specify the exact pricing for each currency, so I guess I misunderstood? If you don't keep up with exchange rates and update your pricing to suit then you may end up making less from the non-US sales in the long run.
Of course if you run a regional site that bills in EUR and you get paid in EUR then it's win win win.
