Standalone Apple AirTunes

I love AirTunes!  For those unfamiliar, AirTunes is a feature of the Airport Express Base Station that allows your computer to wirelessly stream music to a stereo or set of speakers.  It works great and it's incredibly convenient for freeing your music from your computer without transferring music to an iPod or (bleh) burning a CD.  The problem is that the only way to get AirTunes is with the $150 Airport Express Base Station which is also a wireless router, wireless range extender and wireless print server.  While $150 for all that really is a good value, it's a little steep if all you want is AirTunes or already have a happily working router.  However, it would be really great if Apple made a $40 or $50 device that just provided the AirTunes functionality.  I'd pick one up in a heartbeat, maybe even two.  Who knows, maybe Apple could never make a standalone AirTunes device in the $40-$50 price range, but it seems pretty feasible to me.  Alternatively, it would be great if Apple added AirTunes to more devices like the iPod Hifi (as I proposed ages ago) or even an iPod dock.