We can currently restrict the visibility of a space from being viewed by other people. I have suggested before (
CONF-938) that a page / blog be restrictable in a similar way, but the idea can go a level further.
Should a well established page (eg: change log, or press release page) be revised and a new revision created - it would be extraordinarily useful to be able to restrict the visibility of that page to "editors" (or another specified group) so that it can be vetted.
The editor would then be able to review it and set it to be publicly visible (after any alternations he deemed to be nessesary).