Real Estate Radio

Some enterprising fellows are now offering to put a short-range radio transmitter in your 'for sale' sign to broadcast a commercial to anyone on the block interested in your house or condo.. Its an interesting idea, but most people don't bother to put a price on their sign, so what (besides music and sound effects) are they going to put in their custom commercial? And would this marketing system have any advantages over the good ol' world wide web?

I'm still cringing from the last Rennie Condo ad I saw in a theatre, I wonder if these audio commercials feature soft jazz and lots of talk about 'lifestyle'.