MediaWiki_Unembed - Takes a MediaWiki file with other wiki pages embedded inside (via the {{:Embed}} tag) and unembeds them, resulting in a MediaWiki file with all the embedded content inline
MediaWiki2Book: Uses Pandoc and some nice templates to convert a MediaWiki page to a good-looking PDF
Unfortunately I’ve had trouble with API access on the MediaWiki instance we’re running, so you’ll have to manually copy/paste your MediaWiki page’s wikitext into a text document before runnng mediawiki2book