As of v0.6, jMUD supports output to multiple page elements. This page demonstrates such behavior, I've written a basic ZMP plugin. This demonstrates the plugin and how to add custom commands. For this demo, I've added two:
For testing, enter the command zmp followed by a space, then the name of the ZMP command you want the server to send, and then any arguments (space separated, though you can group by using quotes).
Aside from the two commands listed above, only the ZMP core is included.