Roadcasting: A Potential Mesh Network Killer App

This roadcasting idea sounds really cool. It is really great to have your whole music library on your iPod, but if you solely listen to that, you will never hear any new stuff, so you have to resort to the radio. Sure you can subscribe to podcasts, but it is hard to find the right ones and not quite as easy as flipping the radio dial. Plus podcasts are better for talk, and I usually fast forward through most of the songs. Roadcasting would be great because you can listen to other people's playlists who have the same taste and get to hear new stuff, without a DJ telling you to like it. I wonder how far the transmissions will go. Do you have to be driving in the same direction? 2010? Can I wait that long?