There are numerous occasions when you want to listen to something other then your iTunes collection. Satellite radio such as XM and internet based audio stations provide a great alternative.
The hard part is launching multiple browser windows just to listen to a stream. Enter Radium.
In a neatly packaged menu bar application, Radium allows quick access to a multitude of internet radio stations including your XM account. A very fast search function lets you find a particular station or theme.