Songbird for Linux, whilst officially no-longer supported, will continue to live on thanks to a community driven effort.
The project, which was originally titled Lyrebird, finally has a definitive new name: Nightingale.
Very apt.
The team is made up of many longtime Songbird contributers so hopefully with some dedication to the Linux platform amongst them they can come up with a something sweet.
You can check out their official site over @ getnightingale.org
Thanks to Cenwen for letting me know