There has been initial work and massive progress on networked multiplayer since #hnm 0.9.2 release last May!

A working client/server model, implemented using #libenet, is already available in the 'net' branch of the dev repo.

Below is a screenshot of a two-player networked game, with two clients and one server hosted on the same machine.

Work remains to be done to finalize a first version of the protocol, and adapt the game interface, but it's looking good!