It is my belief that many of the shorts represent accredited investors who are short the common and long the debentures. They have been collecting the interest off of the debentures (or will) in the security if there were any problems (still a possibility) with Pod 1, then they would make out on their short. They will ultimately cover their short and go long the common through the conversion privilige on the debenture. Thereby, winning by their locked in price on the debenture conversion privilige and the interest return on the debenture. The only way they could lose is if their was a catastrophic design or operational failure at Pod 1 that was irremediable.
Brian