Mmm… don’t you like the What’s Playing section on the sidebar? It’s powered by What’s Playing plugin for Winamp 3. Here’s the PHP script I’m using here on glutnix.com.
What’s Playing (the way I’m using it) sends the id3 details of the last n songs to a php script. This script then takes those details and writes a bit of html which you then include in your page. What’s Playing can also upload an HTML file to your FTP server if that’s how you would rather do it.