Sony, among other companies like Soundcast and JBL are catching onto the possibilities of wireless music for the home. Sony's S-AIR technology delivers a practical wireless multi-room solution without complicated set-up requirements, such as IP addresses, WEP keys and pin codes. Wireless audio can be transmitted from the main system in the living room to multiple rooms throughout the home — up to 164 feet — simply by connecting a separate S-AIR Air Station receiver/speaker into a power outlet. It's a proprietary system, meaning you have to have all Sony components in your house to work with these things. I would be interested to see if it really works.