Some friends and I do a live weekly Internet "radio" show using Ustream. We need to be able to stream audio only to iPhones. Ustream will not work because they are Flash based. There is no music in the show, so royalties are not an issue. We would probably not need to stream more than 40 listeners for the very near future.
The best solution would be a provider that does for audio what Ustream does for video but without Flash. Service like live365.com anticipate payment of royalties. Can you suggest a resource? One of the participants is an ISP, so he has (Linux) server space and bandwidth. What application would fit the application and allow him to stream the audio?