Think network-attached storage (NAS) that talks to whatever flavor bx you've got. Windows? No problem. Mac? Sure thing. Linux? Happy to. Pull it out of the box and in a few minutes you've got hot-and-cold running fileservice.
Then I found out there's a community of folks hacking them. Putting Debian on 'em. Augmenting them with all sorts of goodies.
These little hummers are too much fun.