I'm a regular at Brighthand, which is a PDA site and someone posted this website.
www.pocketwerks.com The product is called "Vinyl". Basically, it's a Win32 server that via IP, listens for commands from it's client on a PocketPC and sends them to Winamp. For those of you who just want to have an audio server, this is great. I installed it tonight and am very impressed!