Sonos, maker of networked music players, has introduced a free iPhone application for controlling their multiroom audio system. It allows the iPhone to emulate a proprietary remote, the Sonos CR100 Controller, which sells for $399. The Sonos MultiRoom Music System can be used to play music from any networked computer in your house. It also interfaces directly with several music download and subscription services, as well as recently introduced support for free internet radio services. Even
