This OrphansWanted overview show which pages in the Wiki are:
Orphans (the page exists, but it has no links to it)
Wanted (the page does not exist, but there are link(s) to it elsewhere on the site)
Valid (the page exists, and it can be reached through a link)
Each table shows the reference count and a link to backlinks.
~~ORPHANSWANTED:all!wiki!talk!templates!playground~~