[HH] Arduino Yun runs Limino, a trimmed down Linux

[Tom Metro]

Is this the first Arduino board to run Linux? I guess it uses an SoC
alongside an Atmel ATmega32u4 microcontroller, so Linux isn't really
running on the Arduino. More like a pcDuino.

http://www.element14.com/community/community/knode/single-board_computers/blog/2013/05/23/arduino-yun-and-arduino-robot-make-an-appearance-at-maker-faire-2013

   ...Arduino Yun, which fuses a Leonardo board with a Wi-Fi (Atheros
  AR9331) SoC running Linino (customized version of OpenWRT). What makes
  the board notable is its ease of navigating complex web services (XML
  and HTTP transactions) as the Yun incorporates a Bridge library that
  hands over the heavy lifting to the Linux-based SoC. The board comes
  outfitted with everything a typical Leonardo board such as a USB port,
  microSD slot for more storage options and wired Ethernet as an extra
  connection option (over Wi-Fi?). Once the board is turned on, it
  creates a Wi-Fi connection or access point (simply called 'Arduino')
  giving the user full access to the internet. The board supports both
  Shell and Python languages like its Leonardo cousin allowing users to
  customize their boards with a wide range of options.

  ...will retail for $69 US and will be on the market sometime in June
  (2013).

So it sounds like the functional equivalent of taking a router running
OpenWRT and and attaching an Arduino to it, where the router side of
things remains stock and used as a communication co-processor, while
your custom development happens in the Arduino.

For about the same price the pcDuino gets you a board that can run
Ubuntu, and I think has a single processor, and just emulates the
Arduino behaviors (like ability to run sketches) in software (plus
electrically Arduino compatible I/O connectors).

http://store.gadgetfactory.net/pcduino-linux-dev-board/

The big win for the Arduino Yun is that it appears mechanically
compatible (size and connector position) with the Arduino family.

 -Tom