Oh yeah, I've seen it. I even discovered why it did not work with Mozilla a while ago (you can probably dig up the post). I wanted something lean and mean that works with Mozilla, so instead of hacking charcoalgrey's, I just rewrote one from scratch. Another goal was to have everything included in one single xsl file, and no images (hence the lite).

Mine also uses a different method of displaying the currently playing track information. Mine displays the current track using text instead of the png available because text is easier to read. I'm using an XMLHttpRequest object which allows the browser to make http requests in the background. I use this for button presses and commands, too. It's asynchronous, so it won't lock up your browser while executing. GC99's used a lot of MS-specific hacks, and the javascript wasn't so cross-browser.

And I wanted to learn xsl.