Even though HP said that it was out of TouchPads, it looks like there's a few left for developers to purchase. HP's brought back its developer device program, which gives the opportunity to purchase up to two 32GB TouchPads for $149.99 each, as long as you send in a request for this discount coupon by November 18th. The purchase has to be completed by November 27th, assuming stocks last that long — ever since the TouchPad fire sales began back in late August, the device has been hard to find, so we wouldn't count on them being around by the end of the month. This program replaces the previous developer loaner program in which you could borrow a tablet for two months, free of charge. Unsurprisingly, HP doesn't want these TouchPads back — all sales are final.
Thanks to Steven for the tip!