For low power use, why not just get the Raspberry Pi with Plex DLNA server ?
I think the S1 will consume little power, but it comes in the 9 series case, so it takes up too much space.
There is a plan to make cheap Omnia server, but not within the next few months.
For the first time, we completed the following test this week:
Android phone running Omnia server and renderer streaming to/from Omnia SP1 (that's the S1 with screen that we are not releasing).
Android phone with free Omnia apps:
Omnia server - allows the Android device to become a DLNA music server to stream music from its storage - FREE
Omnia receiver (renderer) - allows Android phone to receive or stream to another DLNA device (doesn't have to be Android)
Omnia player/controller - allows Android phone to control another Omnia device
*** The above are all FREE
NuPrime Omnia hardware (including future integrated amp or DAC with Omnia inside):
Omnia server - able to take advantage of custom hardware for better performance
Omnia receiver - allows Omnia device receive or stream to another DLNA device, able to take advantage of custom hardware for better performance
Omnia player - runs on device that has a screen
If you just want to have a music server and receiver in your car, you can just get the free Omnia apps on an Android tablet.
Our project has suffered delayed due to the amount of work required for such a complete system. We don't want to develop a half way solution, there are too many of those on the market today.