I figured I would share what I've managed to set up tonight after being far too bored.
Basically what I've done is set things up so that my pocket pc is connected to my home network through bluetooth and it is streaming any media on my computer over to my pocket pc which is now connected to my 2 ch system. Why wouldn't I just use a cable from the soundcard you ask? Because that would be the easy way ;) Also, my pocket pc as a source is almost comparable to an entry level dvd player as opposed to my noisy and terrible sound card. Plus it's cool because I can now stream the 3000+ songs from my computer to anywhere in my house.
I won't get too into details unless people actually care to set up something similar themselves. Just a fair warning -- This wasn't really a simple task. It did take me a while with so many finicky settings. Also, it would be really handy if you've already got a lan setup with file sharing and things of that kind. If not, not a big deal as it's easy to do.
I first connected my pocket pc to my computer through bluetooth with activesync as well as setting up a bluetooth network connection. From there I installed z2's PocketLAN and Pocket Hosts.
Long story short you have to fiddle with Pocket Hosts to set a static ip for your pocket pc and then connect to your network with PocketLAN. Once you've managed to connect to the network you'll be able to see what's shared on that computer and use it as if it were on the pocket pc. You'll be able to watch videos, listen to music, look at pictures, or just do some simple ftp stuff.
I figure this way I can take the whole jukebox / background music idea to a higher level of sound quality even though it will still be mp3's ripped at 320kb/s.
If anyone wants to persue this I can attempt to explain what I've done in more detail.