The blog will be used by a small organisation where people believe to each other with the high level of integrity. It means that no authetication is needed in order to put a post in the blog, but a name of the author is prefered to put separately
as the post is published.
As the post is published no editing procedure is needed actually. An one, bad. solution, might be to publish a new post each time you actually need to edit an existing post.
What we finally want to do is to promote a spontaeous publishing of posts by avoiding to force authors to log in each time a new post is to be published.
I hope You got my point now!
You may answer more extensively than I ask you for.