The problem with a streaming solution is that you need way more tech duplication in the basestation (receiver-like) device. Having a unit that accepted a directly connected portable would allow you to use that portable's own processing power/software to do what it already does all the time, saving most of the duplication. The simpler device would only need to patch into the inputs and outputs to control the portable and allow audio connection to the amplification system.

But it's still a nice idea. Especially since it would be easier to standardize and if adopted would have a chance of working with portables of all shapes and sizes. The only way I see this happening is if Apple adds bluetooth or WiFi to the iPod as a catalyst.

Bruno