I was responding to sorefinger there, Giok.

I agree that it's be much more fun to have different notes and different coiusn from different countries, or from different regions for that matter, and there's no reason this couldn't be done using with common units.

I suppose there might be hassles with people not sure whather a coin or notes was genuine or not, but I'm sure that could be sorted out for notes just as easily as it is with coins.

And with debit and credit card transactions there's no reason why it shouldn't be possible to do that either in euros or in pounds pretty well immediately.