OK, so this is a bit of a sideways question, but does anyone out there know of a decent network diagram creation package out there for Mac OS X? The closest thing I've found is Onmigraffle, but that's more of an all rounder as opposed to being specific to network diagrams.
I suppose that a *nix app should be compilable if there is such a thing out there.
It's Visio that most of the PC fraternity use, isn't it?