The German Wikipedia introduced sighted revisions this week. With the feature, any page with a "sighted revision" shows the sighted revision by default to non-logged-in users; logged-in users, by default, view the most recent revision, whether it has been sighted or not.
Sighted revisions has been in the works for a while, and is available via the MediaWiki extension known as FlaggedRevs. This feature is intended by many as an alternative to traditional semi-protection, particularly on high-profile pages like George W. Bush, to allow good-faith edits while avoiding the very visible vandalism that comes with open editing.
The German Wikipedia is acting as the testing ground for this feature, as that community has been very vocal in their support of such a feature. It is expected that their experiences will affect how the English Wikipedia uses the feature. Testing there is expected to last for several weeks at the least before it is enabled here.