This remarkable little device is sold by Linksys as a small, low cost, Network Attached Storage (NAS) device. It is designed to share up to two USB hard drives, or USB key drives, with a small network using Samba. However it can easily be flashed with replacement firmware, and then from there, an ever-increasing range of Linux distributions. Have a look at Unslung , OpenSlug, or of course, Debian/NSLU2 for more details.