Here's a list of some other PR fanfiction sites on the net. I know that I'm not the largest, so you may be able to find some other good fiction on these sites. If there are any sites that I missed here, just E-mail me the link. Have fun! :)
The Fanfic Shoppe
The Intergalactic Archives
The Command Center Archives
Amaria's Chronicles
Paladar's World of Fanfic
Emerald Pegasus's PR Fic Library
Power Page Productions
Justine's Library
The PR FanFiction Headquarters