Recording Streaming MP3?

[Ed Skinner]

     Is there a way to automagically record a streaming MP3 source? 
Specifically, I'd like to record a regular program such as Prarie Home 
Companion that is broadcast (and streamed, I presume) by KJZZ on Sundays from 
10:00AM to Noon, and Car Talk (Saturdays at 11:00AM for one hour).
     I know how to set up a cron entry but I don't know what program to use 
to open a connection such as http://rio.sc.llnw.net:7020/ for reading, write 
the output to a file (as mp3 data), and then either terminate after a 
specified interval, or die gracefully (and leave the file intact) after a 
"kill" from another, companion program written for this purpose (and 
undoubtedly named, "the grim reaper").
     Any suggestions on what program to use to read the stream and write it 
to a file?

-- 
Ed Skinner, ed@flat5.net, http://www.flat5.net/