Nice app! Although it suffers from the same problem that iTunes has, when playing a radio stream: I have a very unstable DSL internet connection, the connection drops every 2-3h for a few seconds or more. It's like unplugging the network cable for 5 seconds and re-plugging it in. So when the internet connection drops, it says "buffering" forever, so I have to manually click stop and play to resume the stream. Would be very nice, if the app would automatically try to reconnect (i.e. restart the TCP connection) after short timeout, or something like that.

As a workaround to the missing media keys support because Apple won't allow it: You could provide a little AppleScript interface, so that everyone could configure own global shortcuts with FastScripts. If that makes sense. Don't know if that's possible to implement.