That tutorial is a little hard to understand (some of the sentences are difficult to follow) but I was able to get this concept working in 10 minutes or so. One thing to remember is, CRON needs to be running on your server. On our control panel's crontab I have it set to run every hour (and it sends our affiliate program, Linkshare, hourly stats - among other things). So even though I had set a node to publish at 12:54pm, it actually didn't publish until cron ran at 1:00.