One of the killer features for me (before I bought a GPS) was the ability to play RealAudio streams, such as those provided by BBC radio stations.

The trick is to play them in the "Video Player"!

You have to dig a little to find a the direct rpm link (or click 'play in standalone player' when that option is present), but it works great.

eg. http://www.bbc.co.uk/radio/aod/shows...ybaker_mon.rpm
http://www.bbc.co.uk/bbc7/listenagai.../rams/1930.ram
http://www.bbc.co.uk/radio4/realplayer/media/fmg2.ram