The one thing I don't understand about the Yun and Tre is...

raschemmel:
The usual rule is you get what you pay for but after reading thousands of posts I can't remember complaints about quality or value
in arduino products. If you include the clones then your talking about a $3 Pro-Mini. How can anyone complain about that ?
If you want more power . Pay more money.
http://www.robotshop.com/en/single-board-computers.html

BTW-It's very hard to find prices for the higher end board. The above was the only link I could find for prices of some higher end boards.

Great. Post. Thanks.

Found this interesting article. it is a year old but give a glimpse of the micro controller market