Just saw this link: http://www.dragino.com/blog/entry/use-dragino-to-play-with-arduino-yun-part-4-connect-leonardo.html
It provides a way to connect other Arduinos to Yun and share all the Yun features. It is interesting if someone make a 32u4 shield for it, that it will be an ideal Yun clone. Doesn't it !