Currently Being ModeratedMay 15, 2011 1:58 AM (in response to adam139)
I would try and search for upnp in app store there many apps which does that
Currently Being ModeratedJun 12, 2011 7:15 AM (in response to adam139)
I believe with the latest Home Sharing, you are able to stream audio and video from your Mac's iTunes directly to your iPhone/iPad, but it sounds like that's not what you need.
Search for RemoteTap in the iTunes store. It's an application for your iOS device that will give you complete access to your mac. It also allows you the option of listening to the microphone audio of your computer. I don't know for sure that it can stream the actual audio though; if so there's a slight delay...
Currently Being ModeratedJun 12, 2011 7:30 AM (in response to adam139)
if you mean a stream that counts as internet radio, then acquiring one of the internet radio apps on the phone and setting (using appropriate software) your Macbook or PC to become an internet radio source should do it.