Providing you're a resident of the U.S. Seagate is giving you the opportunity to win one of their Barracuda XT 2TB hard disks which includes a SATA-III (6Gb/s) interface and 64MB cache, along with ASUS' P7P55D Premium motherboard which includes SATA 6Gb/s support for further good measure to entice registrants.
The contest is being held on Seagate's Twitter page whereby all you have to do is tweet the hashtag #stxcudaxt which will automatically register you for a chance to get one of these drives into your hands freeeee.
The contest began on Oct 15 and will come to a close at the end of the month, with the winner being announced on November 2.
Only takes a second to register and you've gotta be in it to win it. Good luck folks!