I am focusing my thread to the Feed Reader software available at feedreader.com.
The software says, it allows to save the feeds in the MySQL database.
Have you tried it?
Q1. Even the fresh downloads say: Evaluation version expired (10/31/2008)
Q2. How can I relocate the database location used by the normal setup?
So, the installation becomes portable. Probably the database should reside within the application.