Not that there's some dearth of external RAID devices on the market or anything, but few and far between are those that have FireWire 800 and 400 ports, as well as USB 2.0. NewerTech
's Guardian MAXimus -- which appears to be a rebadged Mercury Elite-AL Pro
-- comes in with up to 1TB, two FireWire 800 ports, and one 400 and USB 2.0 port. Prices start at $320 for the 250GB version, or you can snag a BYOD $180 enclosure, if that's what suits you.