OWC today launched a 500GB, 7200RPM version of its Mercury On-The-Go Pro mobile hard disc. The drive reaches peak speeds of 100MBps via FireWire 800 and is available with three connection options, being joined by the earlier FireWire 400 standard and USB 2.0. OWC is also offering a less expensive dual-interface FireWire 400 and USB 2.0 model as well as a low-cost, USB 2.0-only version. The interna