Blog,+Wiki,+or+Doc?

The following is a link to a google document comparing and contrasting the differences between using a blog, wiki, or google doc. This is a great resource for those who are trying to decide which one will best suit a lesson idea.

Blogs, Wikis, Docs: Which is right for your lesson idea: A Comparison Table

This link was shared with me with no documentation. The best I can tell is that it comes from Mark Wagner's blog Educational Technology and Life.