This is cool.
Released on March 14 (3/14 in USA), aka Pi day.
314Gb PiDrive, on sale at $31.42, a discount of 31.42% from the msrp...
Specially created for the Raspberry Pi's unique USB and power requirements.
As a free download on the WDLabs website, a special WDLabs Berryboot* version will be available that includes additional Raspberry Pi applications specific for HDD storage usage.
*Berryboot is a simple operating system installer (open-source software) and boot selection screen for ARM devices, like Raspberry Pi, to create a cleaner plug and play experience.