The next (and last for a few days, I got some other stuff to do ) version of EmpegTray is out. Get it at http://www.heathcosoft.com/empeg. Added support for HTTP connection (specify either a hostname or IP of the empeg).

Note that rapid repeated presses or holding of a hot key can cause flooding to the empeg (I've done my best to prevent this), so don't hold down a hot key too long unless you want it to do weird stuff.