Other World Computing's Mercury On-The-Go lineup has always struck us as somewhat overpriced and completely overstyled, but it's tough to argue with 750GB of space in a bus-powered portable drive. The newest addition to the company's On-The-Go Pro range is a 750GB model that spins at 5200RPMs and packs 8MB of cache; we won't even begin to tell you what all you could fit on three-quarters of a terabyte, but if your imagination already has you tempted, you can snag one now for as low as $229.99 if you're kosher with a US