Recently, we have been transitioning to cloud services for storage, from the NAS. We use CrashPlan for backing up our Macs and PCs. Since we have been transitioning to Chromebooks, I have copied all of our files to Google Drive. All of our movie content exists on the NAS, but since we have been using Vudu and Netflix for watching movies, we haven't played this content. Since we haven't been really using the NAS for anything other serving content for the Squeezeboxes, this seems like a waste. The electricity needed for a NAS with five 2TB drives, is overkill just to serve our music.
The +Raspberry Pi is a great solution for this. It is a small ARM based computer that uses 3.5 watts of power. The SqueezePlug distribution has every thing needed for a media server, including the Logitech Media Server software, and this distribution supports the Raspberry Pi.