Official - the National Bureau of Economic Research (NBER) today declared that the United States is in recession:
The committee identified December 2007 as the peak month, after determining that the subsequent decline in economic activity was large enough to qualify as a recession. (link)
I wonder if one might very respectfully suggest that the NBER work to improve the timeliness of its declarations? I realise the committee wants to be sure but a year is what it took to construct the Empire State Building (and Disneyland if that's significant). Seems like calling a recession "officially"' might be a task requiring less time.
Plus if they'd delayed another month the Intrade bet would have been void.