Remember the saying "Fool me once, shame on you. Fool me twice, shame on me."? If you're the NY Times, realizing that Jayson Blair fooled you 50+ times, what exactly do you say to that? I'd vote for "We're dumbasses!"
There's a lot of interest in why it happened (whether affirmative action policies played any role or not). I can see why there's interest in it, but in the overall scheme of things, does it really matter? Jayson Blair is indeed at fault for what he did at the Times. But executive editor Howell Raines deserves as much blame for allowing it to occur. At any company I've ever worked at, if a manager fails to catch 50+ incidents of anything that serious, they're gone. It doesn't matter why a manager was asleep at the wheel - it only matters that he was.
Employees at the Times asked Raines if he would resign, and he said he would not. And then Raines' boss, publisher Arthur Sulzberger, said that he would not accept Raines' resignation if it were offered. The fact that neither of them seem to think that Raines' resignation is warranted is further evidence of how messed up management is at the Times. (This earns a second vote of "dumbass" from me.)