Other World Computing today expanded the lineup of its portable Mercury On-The-Go 2.5-inch drives, to include models that feature both USB 2.0 and FireWire connectivity. The USB/FireWire combo drives are compatible with any operating system with USB 2.0/1.x or FireWire support, including Mac OS 8.6 or higher and Mac OS X. The drives are available in 20, 30, 40 and 60GB sizes and speeds of 4200 or 5400RPMs. Prices range from US$189.97 to $399.97.