Is there a stand alone player for SoundCloud? To clarify my question, I am looking for something similar to Last.fm that would populate a tracklist based on incoming tracks or a list of favorites, run on the desktop and continue playing.
You can get a plugin (add-on) for standalone players like Songbird, run searches and browse incoming tracks from followed artists. I guess this isn't standalone Soundcloud, but it is a desktop based application.
I suspect that you can probably find plugins for other similar players, I just use this one.
You can use CloudDeck with Adobe Air. Will work for Windows, Mac, or Linux this way. Looks like it has some track suggestion features, although I have not delved deeply in to the feature set.
Since I posted this, I learned of Chrome's create application shortcuts and have been using this in-lieu of a native app. It's not a native app, but it get the job done.
A quick Google search also reveals a number of apps available in the Windows App store: http://windows.microsoft.com/en-us/windows/search#q=soundcloud&s=Store&ocid=appscle_search