The interface could be a little more intuitive.

It wasn't clear to me that 'spin' just meant 'get a song' ... I thought it would end up with a tracklist. And then I wasn't sure 'spin' meant 'get me a different song'.

Also, clicking on the name pauses it, even though a URL appears on my status bar. Not at all what I expected. (Though I'm glad there's a pause, because I didn't think there was one.)