Hmm, I've had a reasonable look into this now and I have to say there's a fair bit to it.

There could certainly be some quick wins: The primary player controls, volume, stop, play, pause, skip, prev, mute, shuffle, loop etc are easy commands to send.
But getting the information back is less straightforward.

Certainly isn't a natural fit for how vlc-remote is structured. Vlc uses simple GET requests with data coming back as XML. Squeezebox's web interface appears to be all JSON based and a bit quirky in it's use of that as well.

Also because it can control more than one device it requires some additional setup. Although I have to say it's simple media streaming is tempting.

How hard have you bugged the members of the Garage project? There is mention on their forums of someone getting a build running on the N900 pre 1.2.