nsayer writes "I'm a fan of XM Radio. The least expensive XM radio you can get is the XM PCR, which is powered and controlled over a USB connection to a host PC (the audio does not, however, come back across the USB connection. It's just got an analog line-out jack). Unfortunately, the only software they give you is for Windows. But fortunately, it's been reverse engineered, so I was able to write MacXM. At this point, it is very stable and easy to use, and so far as I know it is the only XM radio software that integrates with the iTunes music store (click a button and iTunes pops up with a search for the current song title and artist)."