Dynamically insert an article at the top of a taxonomy archive – or?

I am not sure off-hand if custom taxonomies have this (I’m almost positive they do) but Tags and Categories already have a Description field you can fill out, and then display on any page. It would take some modification of your template files but what you can do is something like this:

1. Enter the description in the appropriate field

2. Use this code to display it on archive.php or whatever controls your archive pages:

   $termdesc = term_description( $term_id, 'location' /* or taxonomy name */ );
   if( $termdesc != '' )
       echo $termdesc;
   

Code above is using term_description.