Rogue Amoeba Software released a Public Preview version of Pulsar. With Pulsar you can listen to streaming XM and Sirius Internet radio stations. However, after 20 minutes, the signal is degraded significantly, so you have to buy a license for $1. And you have to a subscriber to XM Radio Online, Sirius Internet Radio, or both.
This is mac software, so if you have a PC, you are out of luck. That’s something I don’t like about the software right off of the bat, but if you own a mac, it is free to anyone who owns or purchases its Airfoil for Mac 3, Audio Hijack Pro 2, Fission, Nicecast, or Radioshift products.
When you open the software and login with your account, you will see Pulsar’s interface shows station names, descriptions, and the currently playing songs, artists, and genres. Next to each station is a play button and a heart button. Clicking on a play button begins buffering and then playing a stream (and changes the button to a stop button). Clicking on a heart button turns the heart red and adds the station your favorite.
If anyone has tried out this software, let me know by dropping me a line or leave a comment. This sounds like a pretty good service, since a lot of audio quality on internet radio is pretty lousy.
In a spot check of several stations, I found the audio quality to be comparable to other Internet radio stations. Buffering times varied greatly, even for the same station. And Pulsar was sometimes slow to catch up with displaying the currently-playing song on several occasions (the artist and song listed on the station and in the playback area didn’t always match up with each other, for example). Overall, Pulsar’s clean, iTunes-like interface was much nicer to work with than the respective services’ Web players.