Okay, I've made my "hello world" module, but there's somethign that's confusing me. I make changes to templates/foo.html, and they don't show up. That's because the template is actually stored in the database, table tplsource. Isn't that "Update module template .html files from themes/your theme/templates directory?" option under general preferences supposed to automatically update the database entry when the file has changed?

Obviously I'm missing something here, please help