I hadn't heard of an editorial calendar either, but I can see how useful that would be. Wordpress has an app that allows me to create draft blogs, complete with html, and I can publish and view stats from the app, too. So any time I have an idea, I just quickly create a draft. I've been using Twitter daily, so I haven't really thought about using a calendar. I might try it though.
What are the advantages of blog-specific editorial calendars over a regular self-made calendar? Are there special tools that a newbie like me just can't even imagine?