Attached is a zip containing an executable to test against SqueezeBox, unzip it to somehwere executable on your n900. It's not packaged at all so you'll need to start it by name & path from the terminal.

PM me when you get a chance to try it out, sure something will have gone wrong early on but I'm curious as to whether this will work (obv. I don't have an environment to really test this out).

It should prompt you to select the player you want to control once you've entered your server details.

Happy Software Freedom day.