songbird

    One thing that I have really missed in playing with songbird is Global Hotkeys for changing the song, etc. This functionality is available for Windows, but Linux (and Mac) users still have to wait if we want official support. There is a workaround, though, thanks to GeekShadow's addon Command Line Support. This allows for all kinds of clever hackery, including global Hotkeys.

Here's a quick javascript+XPCOM recipe on how to get a list of the user's playlists in a songbird extension.