Have you tried MapTool ( http://www.rptools.net/index.php?page=maptool ) or OpenRPG ( http://www.rpgobjects.com/index.php?c=orpg )?

If they look like good tools for you to use, I could help you get them set up somewhere... Maybe I would even play if I got involved. wink

[Linked Image from zandadev.com]