Who are the folks mediating that decision?
At the moment that's us, but for no greater reason than we happened to built it that way, and we weren't expecting many corrections, or indeed 6000 submissions in a couple of weeks. Making the corrections inteface open is no problem.
Suddenly we would have
Wikipedia pointing (en mass) to a map system controlled by a single person/entity. There is not much information on their site, other than to mail "team@placeopedia.com." The "mysociety.org" site which sponsors it points to Tom Steinberg as the project leader.
Hello!
But given Wikipedia's tradition of openess and transparency, a strong link to Placeopedia, the way it operates now would seem to be rather incompatible with that idea.
I think you might be confusing tablets of stone with 'the way we happened to build this project in a couple of days'. If you want it open, it'll be open. The only question is how to make such a revision interface work.
Tom