recording mp3s from internet radio stations (Score 2, Interesting)

There is quite a few programs out there right now that allow you "record" songs from streaming radio stations. ie. station ripper, rmbsoft audioripper. etc.. more available here - http://all-streaming-media.com/record-audio-stream /record-winamp-radio.htm

I see this like recording songs from the radio or movies/shows from the tv which im not too sure of but is legal.. right?

How would this be looked at by the RIAA?