WD unveiled today that it is now shipping WD VelociRaptor hard drives, the next generation of its 10,000 RPM SATA "Raptor" series of drives.

The new WD VelociRaptor hard drive is modified specifically for PC and Mac enthusiasts and professional workstations.
The WD VelociRaptor hard drive comes packed with twice the capacity and a 35% performance increase over the previous generation.

The WD VelociRaptor hard drive is built with enterprise-class mechanics and packs 300 GB of storage capacity into a 2.5-inch enterprise form factor.
The 2.5-inch WD VelociRaptor drive is enclosed in the IcePack, a 3.5-inch mounting frame with a built-in heat sink.
This customization that fits the drive into a standard 3.5-inch system bay and keeps this powerful drive extra cool when installed in a high-performance desktop chassis.

WD VelociRaptor (model WD3000GLFS) hard drives will be available on Alienware's high-performance ALX gaming desktop by the end of April.
WD VelociRaptor hard drives will be shipping exclusively through Alienware this month and will be available at select distributors and resellers mid-May. Manufacturer's Suggested Retail Price (MSRP) for the WD VelociRaptor 300 GB is $299.99 USD.
Via the VelociRaptor product page.

See also this Western Digital VelociRaptor VR150 HDD Review and this WD Velociraptor 10K RPM 300GB Review.