I've ordered my Yun and currently waiting for delivery. My question is this - is it possible to create a "standalone" Yun appliance similar to creating an atmega based product after prototyping on the Arduino or is the Yun just too complex or contain proprietary hardware?
I don't think you can easily replicate a "custom" Yun in your own circuit the way you can do with an Atmega328 after having cooked it in the Arduino Uno used as a programmer.It's simply too complex in my opinion to manage the Atheros and WiFi chips.So yes, you can create a standalone Yun appliance, but physically fitting the regular Yun board into it.Perhaps in the future we might see a "Yun Mini" providing layout and size more suitable for embedding into custom circuits than for stacking shields in the usual way.Andrea
AFAIK, Dragino ms14 (www.dragino.com) use the same atheros chip as Yun and they have ported the Arudino Yun to run in their device. The device has a slot which has the SPI and UART interface. So you can develop a atmel board to it to make it a customized YUN end-point product.
For end users they charge 45$ plus 22$ shipping the board to Germany(US even more expensive). On arrival the German customs will charge an extra 19% import taxes.So you would end up spending 80$ for a board without the extra atmega already connected. Does not sound like a bargain to me.