Or is what we want a Bliki

"A Bliki (also known as a WikiLog, Wog, WikiWeblog, Wikiblog, or Bloki), is a blog with wiki support. This means that after (or before) an article is posted to the blog, it can be edited, either by anyone or by some group of authorized users. This combination of the two Internet concepts was conceived with the purpose of making the popular blogging experience more interactive. Another possible effect (especially for news blogs) is the improvement of the quality and accuracy of the articles posted by giving more people the ability to edit them. However, trolling may become a problem in such systems.

The main advantage of combining the two concepts, however, is in leveraging the utility of wikis at making connections between ideas; this effectively turns blog posts into proper wiki articles, but maintains the former's immediate nature. Thus, a bliki can evolve as a whole over time, and past information is not merely jettisoned into the aether and lost in the shuffle.

Many wiki engines are capable of providing an RSS feed, so that users can subscribe to receive notifications of updates and changes. However, a content management system with an RSS feed is not necessarily a blog; so a wiki engine with RSS support is not necessarily a bliki. Blikis look more like a blog than wikis, typically showing reverse-chronological order, date-labelled, entries."  Courtesy of the Wikipedia