Many of the mobile editing tools are aimed at the more experienced end of the spectrum. The online tools are almost universally aimed at the full editing experience. I think however there's a lot of value that can be extracted with the right questions; in a much more constrained use case.
For example, Foursquare will encourage users to rate attributes of a place they've checked into, like "Is X good for lunch?"
We've got similar small focus editors - things like http://ae.osmsurround.org/ae/index - but we really lack any idea of "does the user know much about the place to answer questions?"
https://developer.foursquare.com/docs/users/checkins does give us one means to ask for this; as did previous versions of the facebook API - I'm not entirely clear now that posts being tagged with 'locations' would allow you to understand a similar kind of relationship.
http://openbeermap.github.io/ almost perfectly describes the kind of experience I'd interested in - it has a lot of domain specific knowledge and guides the user into authoring the brewery tag correctly; ditto http://openwheelmap.org/ - both could be tremendously made more useful if coupled with user history and focused data enhancement tools.