Maybe they do these 24 hour fire sales "under the radar" for a reason. When best buy did this (and burnt me), they only had a handful left. I know these tv's are pretty scarce, so I don't see these tv's being advertised in the sunday flier. How many of us just on this forum call around to the store? Put a sunday ad into the works and you will have tons more. This is all positive thinking and giving the retailer the credit, but this is my take on it.
Inventory gets lost -- then found. Maybe they are finding the last of the model year and quietly clearancing them out. These deals could be regional, but with the internet, we all hammer the site, they still can ship nationwide.
I know from past experience that they do full store/warehouse inventory checks, typically with 3rd parties. New items turn up, while other disappear. I worked in both environments, mistakes happen. The inventory is updated and then dealt in the manner they see fit.
I'll find out if my p55st30 shows up today (friday) in one piece. I placed my order the day I seen the deal at 8pm cdt. I called to confirm inventory, then told them I'm driving over right now with cash in hand.
I'm still very wary about this and doubt if I will sleep much. If my tv shows up tomorrow I will believe my theory; if not, I'm ready to grab my pitch fork, rally the villagers and storm the castle.