University of Chicago economist Casey Mulligan says we're overreacting.
I do not disagree with his broader analysis. His glazing over liquidity concerns will strike many as pollyanna-ish (myself included), but I do think he gets the big picture correct.
No matter how pervasive irrationality may be on the downside, it is equally so on the upside. When the cavalry comes, they will come in droves.
There is also an important distinction between our situation now, and the one faced in the 1930's: the international liberalization of capital markets.
It is for this very reason that things aren't likely to be as bad as predicted.
All of this assumes that we let them rescue us (see Dubai Ports World, et al). We aren't in much of a position to protest.