Sonos has announced today a free application download for iPhone users that will enable them to control the Sonos Multi-Room Music System from their iPhone 3G, iPhone, or iPod Touch. The app is actually pretty cool for iPhone users with the Sonos Mult-Room Music System but I don't know if it's a good idea to buy an iPhone for current owners without one.

The Sonos muti-room system is the first wireless multi-room music system that allows users to play music all over their house and control it from the palm of their hands. Check out the screenshots and the video demo here: http://www.sonos.com/iphone