I checked Openfiler and it should be X86-only as usual. Much higher power consumption for sure.
On the other hand, the architecture of GoFlex Satellite and Gauntlet Node is based on ARM instead of X86. Their processors are more power efficient and suitable for mobile purposes.
So far we might only have one particular affordable board that should be good enough for doing what we really want:
Pretty awesome if you ask me. Granted the architecture is ARM but having such tiny board with SATA would be killer IMHO.
How about tiny boards with X86 processors? Industrial boards are totally expensive as heck:
Atom might not be exactly power efficient but at least the prices are not too bad:
There are more options with X86 processors if you were interested:
Another FYI - look at this "portable" NAS with dual SATA slots:
Or someone could find a little board cheap enough with mini PCI-express slot and add an adapter like this:
That cubieboard could very well be closer to a single box solution once we stuff that inside a case with a battery, a hard drive, an ODAC, and an Objective 2 amp. Then we simply use a phone or a tablet to control the playback of that headless system remotely without worrying about the streaming aspect anymore.
Eventually someone might see the light and create a more integrated system that includes the entire chain from storage + source component to DAC to amp. Less cables to deal with and only a single source of power is required.
Another plus with Linux would be bit-perfect playback of high resolutions music without downsampling. That could be achieved with Music Player Daemon as mentioned below:
Sorry to bring something up with different alternatives but sometimes it could be nice to have other choices.