Well... the thing to remember is that their are supposed to be 2,000,000 units total for the JAP and USA launch of the PS3. I think that averages out to like 3 per major store so yea... alot of people will be disappointed. But thats far more units then XBOX 360 had for its launch (300,000 I think??). And Sony claims they will put out a million units per month every month after launch.
Something tells me though, that they will produce alot more of the 499$ versions then the 599$ versions. Alot of people have complained about the 100$ difference, with good reason. The 100$ difference between the core and premium xbox 360 was a different deal. The stuff they added for the extra 100$ was worth more then 100$ so their was no reason not to get it... With the PS3 you lack 40GB HDD space, Wi-Fi, HDMI and the card readers ( I also think that while the 499$ verison of the PS3 supports bluetooth controllers that it will ship with a wired one). Personally I would care to get the 600$ one, due to the fact that I would use every feature in some manner. The HDMI is the only thing I wont use right off the bat, I probably wont have an HDTV until sometime next year but still... its worth it. The hard drive size is impossible to weigh until you know how much space on average a game will take to save.
Even if the price was less to buy the 499$ one and dongle on all the attachments then to just get the 599$... who wants to daisy chain stuff to their PS3??? I would like it more to have it built right into the unit.
Nice find though Out4it!!