Anyone shorting at those prices, has made (or will make) a ton of money off the longs who bought their shares.
If it was the PIPE that provided the $8 million investment in early 07 who was shorting, simply by virtue of the repricing of their stock to (I believe) 50 cents, that becomes the most they'd have to pay to cover (shorting against the box). They could also buy whenever the price falls low enough and cover at even less now. I certainly hope that's not what happened.
If anyone shorted 4 million shares at more than $1.80/share, I'd think they'd be long covered by now. Having made at least $6 million in profit, would they really hold on to see if they could make another $500k by driving the PPS down below 10 cents? I don't think so. Especially if it was the investment PIPE as they would still have a lot of shares.