Work asked James Theophane to do something for their Christmas card. He works for an Interactive Agency. To cut a long story short, after a company-wide upgrade the agency had a lot of old mobiles gathering dust. He took these, built and hoisted a gigantic interactive chandelier/mobile that plays Christmas jingles in their reception. To add a little xmas spice to the mix, anyone can go online and enjoy annoying the hell out of people waiting around in the reception, by playing the thing live from their web browser.
Details on how he made it and some behind the scenes content are available on his blog: theophane.co.uk/mobile-mobile