I survived a few high traffic moments from Hacker News and was thrilled to see the site stay up even when I managed to break MySQL on the server.
Another benefit of static sites compared to dynamically generated pages is speed and reduced server load. Tyler Hall has a similar setup to this site, but he uses incron instead of a normal cronjob. This should reduce the server load even further if your hosting provider gives you enough access or you have complete control over your server. Once you install and configure everything posting new articles is even easier than with bookmarklets, e.g. for Tumblr or WordPress.