I received a tip that the first Nikon D5 shipment will come with a Sony 32GB G-Series XQD memory card ($109.95) and a Sony XQD reader ($37.95) included for free, just like the D4 did four years ago. My understanding is that this will be valid for all worldwide shipments and is not specific to a region.
The new line of Sony XQD memory cards will be available at the end of May are now available.
UK dealers have confirmed that the D5 will start shipping around March 18th.
Nikon D5 pre-order links: B&H | Adorama | Amazon | BestBuy | WEX Photographic | Jessops.