I don't particularly like the blog format. The central organizational feature of a blog is a timeline. The idea that something you said is "older" than some other thing is not a particularly useful relationship. Though you would probably like to hear if a particular idea had been updated.

I think something closer to a personal wiki would be better. All links to entries would be versioned so external links always point to the content they intended, but the entry would contain a link to an updated version if it exists.

I think having a medium where people tend to curate their content, rather than forgetting about it and moving on, would lead to higher quality content over time.