Oh man, those babies keep dropping. After MIR, they're only $175. That's a steal.
A card that has decided not to drop in price is the 285. It has been pretty much the same price since it came out. Even the 295 has dropped some. You can get some of them for $470 now. Although out of stock, an xfx 4870x2 on newegg is only $370, not much more than a 285.
The problem is really the large dies they are using, which means if they start selling them too cheaply, they start taking losses for each card sold. Hopefully they learn that lesson before they release GTX 300's.