I tried displayerserver 1.1 with hijack 112 and the buttons don't work in the applet.

For your info my features of displayserver and kernal that goes with it were.

1 ability to run a pioneer remote with empeg (well covered by hijack)
2 ability to stream MP3s over a network to winamp
3 ability to control player over ethernet with a small applet where you could click on the buttons and control the player.

Frank said that he was hoping to have another applet which had a remote on it and that would be clickable to control the player.