It is expected that OfCom will legalise the transmitter devices which enable people to play digital music from their iPod via a radio tuner. The iTrip is a device which you plug into your iPod and then transmits the tunes to any nearby radio.
This is technically illegal in this country because the Wireless Telegraphy Act [1949] forbids people from transmitting radio signals without a license, which is why iTrips are bought from websites abroad. However, OfCom look set to change the law regarding this, perhaps even as soon as next year.