I don't have one of these but it looks like interesting new technology at a good price.
Link
Item #202 0529 Use Keycode EC6N1526 Offer Ends 09-26-2006


The Sirocco Wireless Home Audio Bridge uses your computer's existing wireless network to receive any and all audio formats streamed from your PC. It is an ideal wireless speaker solution to deliver your music to your speakers or home theater system. With both digital optical and analog outputs for 6 channels, Sirocco can easily connect to most audio systems and supports 5.1 Dolby Digital surround sound output.

Anything that your PC can play, Sirocco can receive through the airwaves. Playlists from any music player or from any store, in any format. PCM, WAV, WDM, AAC and all protection schemes are legally and securely streamed from your PC to your home audio system.