Success!
5,672 books cataloged at Library Thing, excluding "transients" (frequently reissued textbooks, novels I don't plan to keep, etc.). The final count is a little off, since fifty-odd novels issued in various sets have been magically compressed to, um, three. Still, a decent number. Of course, as Mom the Retired School Administrator observed, "a library is a living thing," and so, like living things, my library will continue to grow...