Mark,
I did know that LibraryThing existed, but never tried it. My system is old, and already had basically all my books registered, and that made me keep on using it after an update.
And regarding barcodes: I actually added a barcode scanning function to the system right after I updated it. It was a fun little thing to develop, and a good technical drill to get it integrated with the phone. So now I have a link on my phone that lets me check a book via the barcode to see if it's in my register, and if not, it can look in Open Library for book details and add the book.
Very convenient.
Martin
