This was part of the thinking behind my latest article for BBC WebWise, Easy web publishing . It takes a brief look at three services which are just beginning to offer this kind of functionality - EditThisPage, Free Conversant, and WikiWeb. None of them are as simple as I'd like them to be, but they are getting there. Much still depends on getting browser technology to improve to the point where editing content is as easy as clicking the back button. So that anyone can use it.
Feedback is good.