Updated models with AMD graphics options expected in early 2017.
Apple's Massive North Carolina Data Center Ready By End of Year
Here is aerial footage of the data center from February, 2010:
During today's financial conference call, Apple revealed that the data center will be complete by the end of the year and they will begin using it then. Due to the massive size of the new data center, many have speculated that it will represent Apple's push into cloud computing. iTunes streaming as well as wireless iPad/iPhone syncing have been listed amongst the possibilities.