LaCie 500GB d2 External Hard Drive (USB 2.0/Firewire 400/800) - 300793U $264.50

Combining all of the leading interfaces into one drive, the LaCie d2 Hard Drive Extreme with Triple Interface now also comes in 500 GB to handle your most demanding projects and storage needs. It can be easily shared among multiple users and environments and is conveniently plug & play. With up to 800Mbits/s per bus and up to 64MB/s per drive burst, it's ideal for a variety of professional applications, including digital audio/video, graphic design and system backups. It can be conveniently stacked, stood upright or rack-mounted, and it's specially designed to be ultra-quiet and dissipate heat.

Buy.com is carrying this 500GB External Hard Drive (USB 2.0/Firewire 400/800) for $264.50