An experiment in playing collaborate online music, with the first step being karaoke, video style. See the blog post for significantly more detail.
If you don't already have it, get Firefox 4.0 or later
Install the Mozilla Labs Rainbow add-on, v.0.4 or later.
If you're on Mac (Snow Leopard in particular), after you've installed Rainbow and restarted, quit Firefox again. Then, open Terminal.app, and type:
arch -i386 /Applications/Firefox.app/Contents/MacOS/firefox-bin
- If you're pulling a webm video file, be sure that your web server's mime.types file has the appropriate entry.