[DanielG]

NPR.org streams are a little difficult to rip - you will need to use additional software.

I was able to rip the PJ Harvey show using an app called "HiDownload Platinum". You can download it from here: http://www.hidownload.com/download-npr-audio.htm
They do have a trial version but you'll need to purchase the full version if you want to continue using it after the trial period ends.
There are other ways to extend the trial period if you want to do that...

Once you have downloaded the stream from NPR (it should only take a few minutes) you will have an .flv file. In order to extract the MP3 you will need to use another program called "FLV Extract" (it's free).
You can download a zip file containing the program from here: http://moitah.net/download/latest/FLV_Extract.zip
Info on how to use FLV Extract here: http://moitah.net/

Simply run FLV Extract, a small window will appear. Drag the .flv file onto the window and then the program will extract the MP3 file.

It's a bit of a process, but it sure beats recording the concert in real time.

If you need any more advice, feel free to ask.