Facebook and wikimedia

see [1] among others.

Oddly, though, you won't be able to write on the wall of these Community Pages--they can only be edited by experts. You can apply to be an expert, but it's still unclear how they'll be chosen and when that will happen. So they're a bit static now, but no more than the normal Official Pages.

Most of the outside world sees this as potentially splitting from Wikipedia (checking a bunch of articles yesterday and today).

Collect -

My understanding is not the same as that article. By my understanding the walls - the content - of those pages is drawn directly from Wikipedia data. But I don't know, having only seen the specs, and not the working product.