Bruce Bertrand wrote:
Is it possible to protect a single section of a page?
No.
If not, is it possible to somehow display a page within another page?
You can use templates. In 1.2.x these are mixed into the MediaWiki: namespace for localization, in 1.3.x it'll be a separate Template: namespace. See http://meta.wikipedia.org/wiki/MediaWiki_namespace for starters.
(This is how it's done on en.wikipedia.org)
-- brion vibber (brion @ pobox.com)