I'd like to see the variable @FILE@ added to the place-holders allowed for namespace templates.
@FILE@ should basically be @ID@ - @NS@. This is extremely useful for wiki setups like my own where I use the Title Lookup feature for displaying a link. I.e. the name displayed is not the actual name of the page.
For example, one thing I'd like to do on my wiki is have a template like this:
===== @page@ =====
Write your stuff here
It's also very useful for creating templates for plugins that rely on the page name, e.g. the tags plugin.
I've made this modification to my own wiki and it works well; all it requires is the addition of the following line to inc/common.php at or around line 655.