So I've been working on this project for a year now. It's a gesture controlled robotic arm using the Arduino Yun. The funny thing is we first built the entire thing around the Arduino Uno and once we decided to make it wireless we went with the Yun because it would also let us host the WebSocket server etc etc. Turned out to be among the best decisions that we made.
Our project was mainly inspired by Yu Jiang Tham's video of his Node.js based Leap Motion Controlled Robotic Arm. We've taken the concept one step further making it wireless and creating a simple Web Application to control it.
Here's a small video of everything working.http://youtu.be/kUqru2KU-xE
On the CLIENT side we've got => Laptop+Browser+Web Application+Leap Motion
On the SERVER side we've got => 3800mAh Lipo+UBEC+SERVOS-Arduino Yun
Instead of me having to put a huge write-up about the project that almost NO ONE will end up reading, feel free to ask any questions regarding the project and I'll make sure you get a quick reply!