Shallot is a media player designed for remote playback and remote access (over the web, RPC). It is currently in alpha status, but allows for playback and library management operations. Shallot is not being actively maintained. Sorry :(

An exmaple of Shallot's player interface (Firefox/Linux):

Download the 0.2.1 development snapshot here:
shallot-0.2.1.tgz
Requires Pyro (will be optional in the future), PyAudioPlay, Cymbeline, pySqlLite, and eyeD3. Note that this is a development snapshot, getting it up and running may be a challenge :)