National Geographic Sitemap
Here's my attempt at the National Geographic sitemap. I guess it becomes a question of how much detail do you display on the diagram, is it to cover the main pages at each level only? And you avoid adding in every little link on the page. Or would you make sure every link is covered, with lines crisscrossing around the diagram?
*EDIT: I read Julia's response to a question in the discussion. So the sitemap doesn't care about flow, that makes things clearer. It covers the organisation, not the promo and in context links on the page that are done on the wireframe stage. So I'd change my sitemap to colour the "donate" and "Account" blocks as yellow, and rename yellow in the legend as 1st level pages.