Sounds like an april fools thing to mee... Lets take this... 500units * ((Atari2600 bargin on Ebay = 1) + 6.66$ per accelerator unit) = 3830$ hmm... sounds like a loss if you compare it to a PPC board like in the post (wich by the way doesn't say if it's an 603 running at 160Mhz or an 604 running at 233Mhz). Lets just for fun say that this was to be true then what about the power consumption of 500 Atari2600's??? Would eat up the cost of any PPC boards in no time.
Still funny though... almost got me at the beginning. :-D