The basic concept behind federated wiki is interesting, but it still needs to be simple, clean, and usable. As it is, the most basic things like selecting text or navigation do not work or work in totally unexpected ways. It shouldn't actually need instructions for basic things like How to Follow Links and How to View Changes ("you can view the changed page on that site by clicking on the flag of that page. Don't expect the link to find the remote site because it will likely be hidden behind the original page on your site." What?)
Just trying to find the list of sites, I have no idea what's going on here: http://c2.fed.wiki.org/view/welcome-visitors/view/federated-...