Meet the JuiceJuice Sparks: smartphone-controlled, sound responsive LEDs that let you put on a light show. They have a weather-proof design and are flexible enough to be used anywhere. The companion app runs on iOS and Android devices. Use your phone to change patterns, adjust speed and brightness, and sync up multiple units.
The control units are Arduino-based boards and have Bluetooth, a real-time clock, a microphone and a SD slot for custom patterns. Sounds pretty promising. More information is available on Indiegogo.