Well, no matter what, Greece is done for. I expect them to be in official default sometime early next year. Next will be Portugal, Iceland, and then Italy and Spain, and then the collapse.
One thing I am wondering is: why is this proceeding slower than the Depression? I have a couple ideas about that.
Even in the early 1930's, Germany was a major economy, among the biggest and they were the worst off. Greece is tiny, only being a small part of the Eurozone. We'll still get to the destination, but maybe not as quickly.
There also isn't the problems of reparations this time around, although we still have a bubble and added enormous, unsustainable amounts of government spending.
Even so, when we go under, I don't think there will be much of an effort to bail us out at that point. we're 1/4 of the world's GDP and nobody else will be in any shape to attempt it.