I have my fileserver set up to run a variety of tasks since it is always on. One of the things I like is the ability to stream a variety of videos to my PS3. Natively the PS3 has limited file support for streaming so transcoding using a great open source program called PS3 Media Server is necessary.
A member of the PS3 Media Server forum, Paissad put together this great script that goes through the entire installation process.
The only configuration that needs to be done is going to /etc/pms-linux/PMS.conf and specifying what folders you want to share.