I've been thinking along the same line. I'm currently ripping all my cds to FLAC and planning to play all music from the HTPC in the future. But firing up the projector (or controlling the HTPC from another machine via VNC) seems like a bit too cumbersome, so I'd really love a full-fledged music remote that allowed me to browse My Music. iPimp looks nice (and thanks about the Chrome advice), but I'm not sure 500 playlists are the optimal solution
All other web services seem to be focused on scheduling recordings etc., right?