Tell us about yourself!
Nexus 7 and the Arduino.
Raspberry Pi - Jack of all trades.
Almost free computers or Using Thin Clients with Debian linux.
Game Boy Android Gamepad
The Raspberry Pi - Lapdock Connection
Guitar to AV Receiver Interface
Home Automation (or Robot Butler called Geoffrey) - iPhone controlled, arduino based
DIY Portable USB Solar Charger ($20 - 4 Ports)