This is lots of fun. I could not see a use until I created one. Just doing that and collaborating with others is helping me understand. Experience helps. I tried the host WetPaint. So far the pages are definitely easy to create, edit, and publish. Now that I've fiddled with it, I'm thinking of using it for several projects I'm working on in the areas of Differentiated Instruction and Project-based Learning. As soon as either begins to unfold, I'll add a link to them.