Pages Extension creates links for new pages automatically, and is an official extension release.
And I also just made an extension that sounds similar to what you're after.
Reading your first post, its kind of hard to tell what sort of extension you wanted (just links? full page creation? separate menu button creation?), but one of those should have what you're after. I don't think an extension exists yet that will just create a header link but nothing else (no page to link to).