I've said the exact same thing on many occasions, velomaniac.
Oh, and while I'm typing, I'll add a bit more. Nevermind the whole political vs monetary union debate for now.
What happens when the Euro collapses? Here's the most likely scenario.
The Euro is one of the 3 most important currencies in the world. If that collapses, the markets (who already are extremely unstable nowadays) wont just crash; they'll implode.
Everyone will be trying to sell their stocks. Due to the supply-and-demand principle of the stocks market, stocks of just about every company will plummet, forcing many of them into bankruptcy.
There'll be loads of unemployed people, and to pay for their unemployment, the government will need to dramatically raise taxes. This only causes a downward spiral, as the surviving companies move to 3rd world countries or China.
On top of that, the people affected by the crisis can't afford anything but the most basic things (if they're lucky), so they'll stop buying consumer products and the economy grinds to an almost complete stop.
This reduces the government's income to such a point that it can't pay unemployment money (or its own debts), and the entire system collapses within two years.
What that would look like? Watch the Mad Max movies and you'll get a pretty good idea (assuming we don't start another world war and nuke the entire human race into oblivion).
Note that I'm not just talking about the countries in the European Monetary Union, but the entire western world. That's the EU zone, the UK, the US and most of Eastern Europe. Most of Asia will take a serious beating as well. You didn't really think that the end of the Euro would only affect those countries within the EU zone, did you?