Buffalo Linkstation Pro Duo with Plex Media Server
I've created a version of the Plex Server for the Buffalo Linkstation Pro Duo. Here is the page with the details and the download link at the bottom.
The main changes compared to the original firmware is that you can turn on Plex on the MediaServer page and you can launch the Plex web interface from there, by pushing a button.
You can also enable/disable Advanced Power Management on your hard drives. It is advised to disable it, if they aren't already.
Many thanks to Orca for supporting and improving the Samsung TV Plex application, I wouldn't have started this if he wasn't there.
Please try it and send feedback.