Athlon 64 prices (at least the 3200+ and 3500+ Winchesters) have gone UP in the last 3-4 days. Monarch went from $251 to $285 to $297 on the 3500+. ZipZoomFly just today raised the price of the retail 3200+ from $203 to $213. So... I wouldn't expect a drop overnight, but perhaps they'll drop again in a couple weeks.
As for 6800 prices, there is a thread dedicated specifically to that in the Video section of these forums. Just check there, cause people are watching those prices 24/7 and updating the list.