Now, if this device actually works, it is very cool. Seen on http://www.broadsheet.ie/
The eco-amp ($7.99) made from recycled card, comes in flat packs of two easily assembled ‘amps’.
More about it on http://www.eco-made.com/eco-amp/ "eco-amp is a product that can be easily assembled and used on the fly to amplify the music in your iPhone so you never have to be without great sound. Use eco-amp on vacation, by the pool, at a picnic or even at home instead of your bulky battery-powered speakers" Designed for iPhones 4 and 4S.