Well. I wrote the entire Sharing our Knowledge series, and scheduled the articles to come out once per day. Two days passed, and nothing appeared! A bit of looking around with Google shows that many other Webmasters have hit the same problem. The “schedule a post” feature is broken in the latest versions of WordPress. (WordPress is the software running this Web site.)
I’ve wasted the past hour going through various peoples’ attempts to solve the problem. No luck! Fortunately, someone has solved it, and provided a WordPress Plugin to fix it. And… it looks like it’s fixed! Kudos to 5ubliminal and the Scheduled M.I.A.s Plugin!