I cornered Nick Piggot at the excellent Radio Festival in Salford, UK. Because, as a follow-up to his excellent explanation of radio's hybrid future at IBC he was wandering around with a Sony Ericsson phone and a rather super radio app on it. We escaped into a side room of the Lowry building which was slightly quieter for a quick mobile update on Radio DNS.
Note that Nick is using the FM radio built into the phone, so this kind of hybrid future for radio can start today - you don't have to wait for digital networks when and if they come. Of course the full functionality of RadioDNS works with digital radio. But making better use of existing networks also sounds like a good idea.
Make use of what you've already got!