I think we need a detailed list of all available fields we may use in the templates.
Something like:
[:blue] User Rating: [/] [:red] {$postrow[$i]['Rating']} [/]
[:blue] User Picture URL: [/] [:red] {$postrow[$i]['Picture']} [/]
and so on... with however many hundred variables may be available to us.
If the available variables are dependant on template pages, then, list all the ones available under them, for example showflat.tmpl, and so on...
This, I believe, will help us all make better templates, at least make it easier to create them from scratch.