Got my Airport Express today from a member on another forum for $55 shipped.
Was a PITA to set up, but after I did a google search I got it sqaured away. Total install time was about 1.5 hours. Apparently there are some people who have literally spent days setting it up. Guess I just happened to do the right things first.
Anyway, this thing is cool. I can play music through my stereo in the living room wirelessly from my PC in the computer room. That's some cool stuff. Especially considering I was going to buy a soundcard to run my computer wired to my receiver. All I had to buy was a mini-toslink-to-toslink cable for $3 at monoprice and the Airport Express and use iTunes to get things up and running.
Now I can play my entire library without having to burn CD's or dig my iPod out of my car. Plus, my wife's laptop can do the same, so if we're in the living room we can call up music through her iTunes and play it through our network, now.
It has other features such as using it as a router, an extender, or network printer server.
Thanks to the members here who suggested I give it a shot. And thanks to the dude who sold it to me for less than half the MSRP.
Just so some people who don't know wtf I'm talking about, here's a link:
http://www.apple.com/airportexpress/features/airtunes.html