"Eligibility Requirements: US-based HP employees, HP reseller partners, HP customers and HP webOS developer partners are eligible to use these App Promo codes. Promo participants require a TouchPad with a current functioning user profile; with credit card purchasing enabled. The promo codes below will expire on August 31, 2011 at 11:59 PM. Promo codes are available for as long as inventories last."

The codes are invalid, it seems that, according to the last sentence, the inventory has run out. Why HP, why?