I said couchDB because it also uses REST and already has an web-based administration interface with "futon"
Futon/phpmyadmin are great for entering or checking data as a developer or system administrator, but I think they are too complicated and technical for the average non-techie to manage content. That's why I built my solution.
Or can you configure Futon to have a really simple interface and also force it to only allow entry for specific keys in a document?