I love Rhapsody, however there are certainly many usability issues. One I've just stumbled across is the inability to mail a custom radio station. Therefore if you want to listen in on the sort of thing I'm listening to this morning, you'll have to create your own radio station as such:

Cool Jazz Artist List

1. Vince Guaraldi 2. Stan Getz 3. Miles Davis 4. Dave Brubeck 5. Chet Baker Similar artists you will also hear include: Tommy Flanagan, Ramsey Lewis, Oscar Peterson, Modern Jazz Quartet, Gil Evans, George Shearing, Gerry Mulligan, Duke Ellington, Clifford Brown, Charlie Byrd, Billy Taylor, Billie Holiday, Art Pepper, Wayne Shorter, Thelonious Monk…

And, I assume, you can use the above suggestions on a non-Rhapsody service, or even on iTunes.