I’m intrigued by the Facecandy board – I will order one today :

Fadecandy isn’t a one-size-fits-all solution. It’s an easy way to get started and an advanced tool for professionals. It’s a collection of simple parts that work well together:
Firmware that uses unique dithering and color correction algorithms to raise the bar for quality while getting out of the way of your creativity.
Open source hardware for connecting cheap and popular WS2811 based LEDs to a laptop, desktop, or Raspberry Pi over USB.
The Fadecandy server software, which communicates with one Fadecandy board or dozens. It runs on Windows, Linux, and Mac OS, and on embedded platforms like Raspberry Pi.
The Open Pixel Control protocol, a simple way of getting pixel data from your creative tools into the Fadecandy server.
Libraries and examples for popular languages. We have Python and Processing already, with Javascript and Max coming soon.
And of course, the LEDs themselves! Fadecandy works with popular WS2811/WS2812 LEDs available from Adafruit, SparkFun, and AliExpress. Each controller board supports up to 512 LEDs, arranged as 8 strips of 64 each.
Fadecandy is designed to enable art that is subtle, interactive, and playful, exploring the interplay between light, form, and shadow. If you’re tired of seeing project after project with frenetic blinky rainbow fades, you’ll appreciate how easy it is to create expressive lighting with Fadecandy.

[From Fadecandy: Easier, tastier, and more creative LED art : scanlime]