The only thing holding this economy up is spending due to mortgage credit IMO. When the stock and job markets went to hell people scurried to find a source of credit to support the lifestyles they had become accustomed to. Those loans have to be repaid and now the economy is starting to stall for the second time, no new jobs, techs and telecoms have been gapping down left and right. I think we're in for it.
As for South America, I think they're in the same boat but they just don't have the reserves to fall back on that we do. My understanding(may be wrong) is that they operate a lot thinner down there (are less capitalized and have more debt) and spend a lot on social programs, government employees and entitlement programs (jobs, welfare, programs cut, hence the riots) so their foundation is not as durable as ours, so the effects of the economic downturn are manifesting themselves sooner. They can't "hold through the wiggles". When things get tough the high debt, high margined, high expense (read "weak") economies are the first to tumble. The same goes for individuals. The best way to weather an economic storm is is to have no debt, no margin(risk), and low expenses.
Just thought of something in regards to the "have no debt" part. If it's good to have no debt it makes sense that it would be even better to be a lender at this time if your loans were HEAVILY secured by real property. When the defaults started pouring in you would end up owning all the real stuff. Maybe that's why the banks have been so agressivly pushing home refinancing.