James Théophane Jnr gathered 50 HTC Mobile phones to create a live cellphone… orchestra?
http://www.vimeo.com/8118831
It’s playing an xmas carol this time, but can be configured for several different tunes.

Here’s a live test:
http://www.vimeo.com/8074999

And here’s the stop motion making of:
http://www.vimeo.com/8118881

And the setup reacting to a tweet:
http://www.vimeo.com/8115997

Interesting idea!

You can check more info on the project at Theópane’s Mobile Mobile page!

Source: TechEBlog