May have found the answer....
Streaming media to 3G phone can be done via Helix Mobile Server.
Real Networks have supplied their software to the 3G phone manufacturers and Helix can supply the 3GPP feed for the phones.
Runs on most platforms.
The licensing is a little steep, prices in GB pounds as of 30th Nov 2009.
25 concurrent listeners £7,000 plus VAT
100 concurrent listeners £21,600 plus VAT
Unlimited concurrent listeners £85,000 plus VAT
David