This looks very cool: Airport Express featuring AirTunes, a small wireless basestation that will connect to a stereo to allow music streaming, for only \$129.
Unfortunately, I’m 5 minutes away from the start of my shift, so I can’t explore in detail yet. Grrrrr!
(Okay, I’ve skimmed through a bit more. I want. Of course, I’d need an airport card for my G5 too…but I want. Geeklust yay!)