Vidon runs on Allwinner and the bsp is opensource unlike BCM2835 whose bsp is only available after sigining NDA. so its more open source than rpi actually is. That is the main reason I suggest allwinner based systems over rpi to all my friends. and from the forums over there they are actually running xbmc on android.Vidon doesnt seem to be open-source / hackable. Personally I prefer to be able to consult the OpenElec/XBMC/RaspPi community instead of relying on 'another Android by an Asian company'
btw, allwinner is a member of linaro group.