does anyone have this or know of anyone who does? everyone i know is an avid music lover, yet no one has this.

I know of one. it is sitting in a shack in the woods of durham, nh with my HD transmitter.
HD is actually "the shit" but it's owned and licensed by one company...

do they have commercials?

they can... HD is just an extension of the FM band. you hide 96Kbps worth of digital data in a 250Khz range of your frequency. A lot of station will nessle other stations with in their data stream. so, you splice it off and have a AM or 2 stations with in the same bandwidth, but at a lesser data rate. that means that some stations will have their normal signal at HD1 and then something like traffic reports at HD2.

the secondary channels are typically commercial free.

i see. thanks

I LIKE ELECTRICITY

electricity doesn't know you even exist dude, i saw it first!!

np. I run an HD transmitter so I know a lot about it. you can also do things like send a text stream over your signal too with the songs titles and etc..

so it's pretty much like satellite but it's free, except for the receiver. ... can you use potty mouth on it?

the rules for HD1 are the same as a normal FM station.
the rules for HD2, etc... are still being defined.

what I hate about it is that a company named ubiquity owns the technology.