http://online.wsj.com/article/SB122938932478509075.html
Japan faced a stock market and housing bubble back in the early 1990s. They tried the huge macro-Keynesian model to "stimulate" the economy by increasing government spending and having the government take over bad debts.
Didn't work. Japan was mired in a recession. The only thing the "stimulus package" did was increase Japan's national debt.
It looks like the only solution was to let the bad debts be wiped out. This required companies who took out the debts as well as the banks who lent the money to suffer and go under. However, until the debt level of consumers and people came down to a reasonable ratio with spending power (in other words, people started living within their means - what a foreign concept!), the Japanese economy just limped along.
I hope Obama's plan works. However, if this plan (spending our way out of a recession) does not work, he and the government have no other alternatives other than letting the natural business cycle take its course, which might mean a very very long recession and a lot more people losing their jobs and a lot more businesses going under.