The Slug is a little NAS-device that can be tweaked to do almost anything. This is a presentation my Slub and what is does (and will do in the future).
Debian Arm installed on a 40Gb, 2,5" harddisk connected via USB
Instead of the built in ethernet I use a DLink DWL-G122 wireless usb adapter.
This is the main usage for my Slug. It plays some stations with MPD, some with VLC from a local server.
This is done by the big server for now but will be moved to the Slug. The lights are attached to Nexa wireless switches, and at the server a Tellstick is used to send control signals.
Mainly used for light level sensing but also control some leds and measures air pressure. On the server for now.
A LCD is connected with a PIC18F2450 usb-pic, a PHP-script displays songinfo and weatherdata. Hardware finished, software in progress.