I've been refreshing the Amazon page throughout the day. They just went up in price by $15; the official Amazon listing is gone and has been replaced by the listings from other merchants.
It may not update fast enough, but http://wantsthis.com will email you when an item in your list goes on sale on that site. You could just add all the sites you'd buy from that still have it at the normal price. (Although I've only tried it on Amazon, fwiw)
According to information given to people on deal sites that asked Amazon associates, Amazon will not be doing the price drop - they're returning all stock to HP.
