We've been hearing about Seagate's plans to offer an unencumbered 3TB hard drive since May of last year, but despite promises of a 2010 launch and the release of similarly large HDDs from companies like Western Digital and Hitachi, we're only now seeing the 3TB Barracuda XT shipping all on its own. We won't claim to have an explanation for the delay, but it's possible that the company's proprietary software -- which breaks the