From Google's own developer page:
"AOA 2.0 includes optional support for audio output from an Android device to an accessory. This version of the protocol supports a standard USB audio class interface that is capable of 2 channel 16-bit PCM audio with a bit rate of 44100 Khz. AOA 2.0 is currently limited to this output mode, but additional audio modes may be added in the future."
so it looks like 16/44 is where its at for android, so hopefully most devices will work.
That's great! Now it just actually has to ship out officially so that I can safely order it!
90% of the time I am using it outside I will have a bag in which to put the amp in anyway so, once this can be confirmed to be working, this will be a nice starting tablet.