How to map a Wiki Page-space?

Sooner or later, there will be so many Wikipedia pages, that a visual mapping system will be necessary to a strategic and managerial overview of the page-space. Such a mapping system might already be a vast improvement over the links-and-lists systems already in place. Perhaps this should be the focus of a 3D pilot program, except that 3D might be a mere cross-section of the complete page-space.