Show to user a path of wiki localization
Some wikis have a feature where it shows to user a path containing the tree of the wiki project. It's very usefull because the user don't stay lost on wiki and It knows the relationship between the current topic and all the rest of the wiki.
On TWiki software (http://twiki.org) there is a variable called parent topic that works like this.
I will help redmine developers adding this functionality. I thougth to use parent_id attribute on WikiPage object to make the relationship between topics and manipulate this variable to display the current path on wiki.
What you think about that?