Other World Computing (OWC) today announced their highest capacity portable, bus-powered storage solution to date — the Mercury On-The-Go 320GB, 5400RPM. The Mercury On-The-Go series offers fast FireWire 800, FireWire 400, USB 2.0, and eSATA options, now with available with 28% more data capacity with this new 320GB addition. The new Mercury On-The-Go 320GB, 5400RPM is available now, priced at US$249.99.