"... What's your favorite embedded system? ..." Arduino ~ http://arduino.cc/ http://arduino.cc/ Hands down the cheapest, most open-sourced and fun stuff you c

"... What's your favorite embedded system? ..." Arduino ~ http://arduino.cc/ http://arduino.cc/ Hands down the cheapest, most open-sourced and fun stuff you can play with. I know it doesn't run Linux, but the cost, expandability through open-design and toolchain make it worth considering for prototyping.