What's the deal? Webs are random, that's what I liked about them.
It's a conspiracy. It's those darn organizers and compulsive arrangers of anything random who have corrupted the whole beauty of the original web. They have even changed the name to "Graphic Organizer".
They were called webs for a reason, because just like each spider-web differs from another these are unique to each creator. Drawn to reflect ideas as his mind sees them. We random thinkers had found a method to our madness. If you just fill in the blanks I think you are missing the whole point. Webs were created for those of us who when confined to the structure of an outline blank out completely.

Here are a few examples of what I mean.
Increase Creativity With Mind Maps
Design Characters Using Mind Maps
If however, the idea of a more structured web intrigues you, here are some links you may be interested in.
Mind Mapping To Prepare For a Novel
How I Use a Mind Map To Build Stories
Mind Mapping
Write a Fiction Story or Book
So which are you? Crayons or Keyboard?