VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- Visor & Deluxe (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=1)
-- Catagorize your library on your Visor (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=1357)

People with a huge library, lots of cash, some programming exerience, and some time on their hands might be interested in this project.

The fellow wanted a list of all the books in his personal paperback library, with author and publishing data, safely stored in a Visor database.
He purchased a bar code reader, and wrote a program to grab the code from each paperback, look the book up on the internet, and store it in the database.

He gives all the details here: http://www.eblong.com/zarf/bookscan/index.html