I remember 3-4 years ago using an online tool that would make ascii-like maps to my specifications and was designed specifically for forum games, but don't remember the link/name. Anyone? I believe I found it back on the WotC play by post forums.
Its not Random Dungeon Generator. Or, does anyone have advice on something else good?
edit: naturally, I just found it here
Ah, darn, it doesn't work with these forums.
There's RPtools - Maptools. Might not be what you want or need, but it's the closest thing I can think of.
Linkie: http://www.rptools.net/index.php?page=maptool