edit: nobody knows the number for sure, but he had enough to do angel investments in foursquare and twitter. See also crunchbase [1]. There was a $28mm series C and the speculation seems to be a bunch went into his pockets.
edit2: after thinking for a couple minutes, there's something just really unseemly about founders getting millions and employees plus investors getting zilch, particularly in the context of a failed business. I think the idea of founders cashing out a bit to free the company to swing for the fences is probably good, but still. There's something about this result that just doesn't sit well.