There are many microcontroller platforms in the world, and some may be better suited for certain applications than the venerable Arduino. Once you have a basic grasp of circuit design and programming ...
ArduSat is an Arduino-powered satellite being funded through kickstarter to foster open satellite access and the collection of data from sensors in space. It will be able to run code for up to a week ...
The Arduino development board has grown in popularity over the last few years and has spawned a myriad of interesting projects such as auto-lacing shoes, The EyeWriter 2.0, and the Mobile Dance Stage.