Stroom is a music library that allows you to share your music over the internet. It comes with a Winampplugin, a database management/import tool, and in the future also a web interface. It supports mp3, ogg, and various other formats.
SpyImage is a php script that dynamically creates an image that displays current track information from winamp. When the image is loaded or refreshed, it is automatically updated with new data. SpyImage gets data from the winampplugin, SpyAmp.
SpyAmp is a web server plugin for Winamp that allows people to connect to your computer using a browser and see what you're playing. If you set permissions accordingly, you may also allow downloading of music files.