Accessibility/convenience-very user friendly; however there will be time someone could create something more elegant (and functional) just because they know how things work now instead of having read or learned about it via documentation first.--If you want people using dkipedia(I'm sure some already exist?) to view content without being forced through logon screens then get rid off what amounts to "logging" requirement...--This really would make Wikipedia look so much cleaner too!--You should also consider adding features such additional pages/groups of categories but let 'em add whatever..It might take them longer depending if these extra options come preconfigured. However considering few people may actually care enough after all its free! If i knew which was possible before writing up anything here.... But yeah thats probably why most wikis won't even ask questions regarding their site structure anyway.