Interesting you should bring my name into this.
I've been fantasizing for quite a few years about a small portable wireless device that would receive the music played on my desktop Mac so I could enjoy my extensive music collection w/o wires, as well as not have to duplicate a subset of the music on the portable or manage two music libraries.
If I were to get a REALLY BIG iPod w/ the capacity to store the entire library [upwards of 35 gigabytes as of this date], there would be the task of periodically synch-ing the two, as well as carrying a much larger/heavier portable [I currently 'lug around' a Shuffle].
But I don't recall ever mentioning this idea to anyone.
My concept goes on to fantasize that w/ current or emergent digital addressing technology, it would be possible to have enough transmitter strength and range* for your own personal music to follow you all over the city, at work, in your car, or at your friends' houses.
- KB
*or maybe do this over the internet with ubiquitous wi-fi, although that would likely bump up against severe bandwidth limitations.
......that is one of the high points. We do have some small community wifi on the beaches, but nothing expansive.....yet.
I knew your ears would ring.....we've been playing in this sandbox for many years.....