asterisk users - Oct 2004 - real/wm/etc audio stream -> zap extension

All,

I'll admit that I haven't looked very hard for this info, but nothing
jumps out at me from the searching that I have done.

Any thoughts on taking a network audio stream (real, windowsmedia, etc),
decoding it, and then passing it to a zap extension?

My desire is to be able to call into my via an analog phone, dial an extension,
have it connect across the 'net to a preselected source stream, and bridge
the two so that I can hear the audio.  Basically remotely accessing the stream
without having to be at a workstation.

Thoughts?  Thanks for any replies...

-Mark