From Fedora Project Wiki
Overview
As we know Fedora Planet has a minimal structure with the upper banner,menu on the left which consists feeds,links,adding blog's, other aggregates and people and in the bottom a 3 lines text for copyrights,quick links.
Reason
Based on many blog posts where Fedora Members do every day there are things which should be commented for good as well for bad. Even you can comment at their blog it's still the need for a simple comment box matched to every post.