I’ve been resistant to the idea for a while now, and i think it is the complexities you speak of that got in my way… i needed (just checked) about 8000 words of blog posts in order to work out why i was concerned by the concept and how i felt about it. I’ve been taking long looks at tony hirst’s work on mapping looking for ways to produce some of the ways of helping people understand that you are referring to… I’m also going to steal your last paragraph, which i think sums things up nicely (better than that ‘Jim’ fellow).