Multi-room audio is the entire buzz at the moment, but funky high-tech devices, including the SunOS Digital Music System (Cosmos, Issue 5, p82), can cost you a bundle. So how about something simpler? Try the Music Sphere from Oregon Scientific. It's small, round, and decidedly retro, but it packs some pretty up-to-date technology. You just plug a small base station into your radio, stereo or MP3 player, and the base station will beam the audio wirelessly straight to the Music Sphere. You can even connect to as many as three audio sources, and switch between them. And it's light enough to carry between rooms as you go.