Actually I'm a proud owner of a Raspberry Pi board...
I have successfully mounted:
-A headless torrent server with Transmission and LCD2USB display board
-Files downloader manager with PyLoad
-A small NAS with USB portable disk, SMB y Debian (Raspbian)
-A media center with Xmbc (Raspbmc), DVD player and 7" LCD monitor
-A retro gaming console with PieMame and arcade joystick
-A digital desktop clock with Clockatoo RTC Clock Board
I call it "RasPi-Rack"