Thanks to a query from Hieronymus, I've now made a PGN database of the annotated games on this site available for download (from the free MediaFire storage site), with a link on the sidebar. I'd put off organizing all of the games into one database, since they were a mix of tournament and training games; they had also been in more than one format originally. However, I think it's worthwhile to have done it. I'll plan to keep the database current, updating it every time there's a new annotated game posted here.
(Addendum: now that the full database is up, I've removed the individual game links from the sidebar, which in any case would have eventually become too unwieldy.)