Angie "webchick" Byron just posted a big thread in the drupal.org webmaster's queue:
This has a LOT in common with our concept of Topic pages (although there are important differences).
Just wanted to put a pointer in this group so that anyone following Prairie knows about the thread and can chime in with your thoughts there. If that issue gets too unwieldy (seems likely) and moves somewhere else (?) myself or someone else can update this post with a pointer.
Happy reading,
-Derek