Part two of Slacker's three prong attack on digital radio has just arrived: Slacker Desktop Radio.

Slacker Desktop Radio goes a step further than its Web-based counterpart, with features like a mini-player, visualizations, larger album art and playlists. Eventually, when the Slacker Portable gets released, Slacker Desktop Radio will sync your custom channels to the device.

The Slacker Portable, Slacker Desktop Radio, and Slacker web-app will all work together, updating each other with your custom preferences as you move from one to the other.

There's a couple downsides of course, one being that the application is still in beta and as such is pretty temperamental (I had trouble running it at the time of writing this). Also there's no iTunes integration and no support for the Mac (yet). But it's still very early, so hopefully all of that will change.

Once the Slacker Portable, their Premium Radio service and the Slacker Satellite Car Kit is available, many people may be singing an entirely different tune.

[Slacker Desktop Radio via TechCrunch]