The Fentix Cube as described by it’s designer:

Featuring a unique ultra-bright (even in daylight) full-colour cubic screen and a unique cubic multitouch touchscreen technology (patent pending) this games platform has been programmed to implement various multi-dimensional games, puzzles, and lighting effects.

This looks like a great device. Mutli-sensory technology has always impressed me and is something I’m still intrigued by.
The BBC have a great write up of this new device that is getting a lot of interest.

…the colourful exterior masks a combination of innovative technologies that have propelled Apple’s iPhone and Nintendo’s Wii to huge success this year.

The cube contains a large battery, an array of LEDs and crucially three accelerometers which can detect the pitch and yaw of the device, and sensors on the inside surface for touch control.