I think a "dock" is unnecessary.
However, if it doesn't add appreciably to the cost or complexity, I think that having a 1/8" analog input jack in addition to the Airplay and/or Bluetooth might make the device applicable to more applications and sources.
Or maybe that's already covered by the Audiobytes.
I have an Android phone, an iPad and PC's. If the device ONLY had Airplay, I probably wouldn't buy it since I'm not running an Apple router at my house. Ken/others: isn't it true that you need the Airplay/Airport router or an Apple TV to make this scenario work? That is, an iPhone, iPod or iPad wouldn't be enough to stream music to speakers like this, right?
bibere usque ad hilaritatem