It's difficult for me to see a stable resolution to this that doesn't either (a) force all the individual economies to look more like each other or (b) significantly decrease economic sovereignty across the board and concentrate the power in Brussels. And neither of those seems very likely. The current situation is something like each of the US states having their own Treasury and Fed and trying to convince everyone they're all printing the same currency. (Not an exact analogy)
"Trichet warns markets pundits not to underestimate determination" Another entry for "Famous Last Words"......