The Barracuda XT is a 7200 RPM 3.5-inch hard drive featuring 2 TB of storage capacity and a SATA 6 Gb/sec. interface.
"Capacity and performance remain the defining attributes of hard drives for PC gamers, digital multimedia content developers and many other customers requiring high-end systems at home and in the office," said Dave Mosley, executive vice president of Sales and Marketing at Seagate. "Seagate is meeting these requirements with the first 7200 RPM desktop hard drive to combine 2 TB of storage capacity with the fastest Serial ATA interface to date."
Of course, before you go blazing off with a SATA 6 Gb/sec. drive, you're going to need a motherboard that supports it. Right now, such boards aren't yet commonplace, but right now options include Asus' P7P55D Premium and Gigabyte's P55 series GA-P55-Extreme motherboards.