Here's my build, encased in Lego.
https://plus.google.com/u/0/photos/1090 ... 3574163649
I removed the USB and video out from the Pi as they stick out too much to my liking, got a cheapo USB hub with 4 ports and solder the wires directly into the Pi board.
HiFiBerry is mounted under the Pi, wireless dongle is a TP-Link TL-WN725N.
External drive is a 240 msata drive.
I got 2 sdcards, volumio and rune audio, but I'm gonna by sticking with rune (love arch linux based distros)