That all depends on how extensive the revision of each book is. If it is only a minor revision to update a few things then I would say no. My plan is to send out supplemental sheets of new information as needed and revisions of pages that need updating. This way you can print only the changes and add that to your copy of the book.

If the revision is extensive, then I may need to charge a nominal fee for current book owners for a complete updated copy that would incorporate all the supplemental sheets as well as new pages.

The advent of Leopard and the subsequent RW version will be a time to look to see if the book(s) needs updating or just supplemental sheets.