Yeah, I had a comment in this thread that is no longer here as well...
#1 Who in their right mind would buy a $200 aftermarket 470 4GB when you can spend $220 on the same exact 480 4GB model ?
#2 Why did it take AIB partners a month to announce 1, maybe 2 (most likely 1) aftermarket 480's when they were waiting in the wings to drop 2 to 7 RX 470 variants ?
My guess is that there are serious yield issues with full polaris 10 and AIB partners know this. This would explain the lack of investment and availability of 480 parts compared to the partially handicapped 470.