I find a lot of comments on this thread interesting (if not at least quite amusing PD!)
A close foriegn friend (who is an economist) predicted a very similar scenario before the war in Iraq (almost as if he new the US (the only major super-power) couldn't resist the temptation to damn itself). He's always said that the Cdn $ should be performing a lot better than it did (that the US was holding it back). Canada has more fresh water than 50% of all the world's nations combined (let alone oil, natural gas, gold, diamonds, wood, silver, etc). As a nation we're incredibly wealthy (in many more ways than just its natural resources too).
Just think about the real estate market here. Although it has slowed down a little, many TO neighbourhoods put a house up and it ends up selling for 40-60 G's more than it was listed (an automatic bidding frenzy occurs). Calgary is even hotter. Now look south and you can see a very depressed real estate market barely afloat.
The hubris of the US administration is truly astounding for most involved in assessing world politics. There seems to be no end in sight. You add all the recent folly in the middle east with global warming and there's no way the North American economies can continue on a sustainable grow grow scale while pumping tonnes and tonnes of hydrocarbons into the atmosphere.
However, I wouldn't throw the towel in just yet. Just like women who wine about meeting a nice "gentleman," and yet secretly crave a "bad boy" everyone seems to look up to the US with mixed fear/disgust/admiration. There's something seductive about power. Probably why the US $ hasn't had a major meltdown just yet! All the kids on the block are still holding their breath to see what's gonna happen next. They're the "bad boys" everyone wants a piece of, and we're the gentlemen who can get some of the "go-between" action.
If you look back in history, there's been many a "mess" that looked incredibly dire (& unsalvagable), that ended up better in the long run. If we were to assess things in the middle of either world wars we'd be pretty pessimistic and yet things didn't turn out so bad after all. The same can be said for the Cuban missile crisis, and the condition of people world wide (before hygiene, vaccinations, etc).
As Ottawa has said "things go in cycles" and I'd agree that while things may look bleak right now...there's a possibility that the US could bounce back. And as you suggest "2-n-V" maybe we haven't seen the bottom hit yet either. But what if the US diverted its military muscle to a more worthy cause (such as rebuilding small African nations, environmental projects, or New Orleans?)