first sneak peek at QNAP's (then) forthcoming TS-409. Today, however, we're looking at the official product: a 4-bay, hot-swappable NAS that supports such beautiful features as online RAID capacity expansion and RAID level migration. Reportedly filled with "disaster-proof enhancements," this unit also includes an HDD S.M.A.R.T. function that provides complete hard drive information including temperature and overall "health." No concrete word on price, but a quick scan of the intarweb pegs it right around $600.