I think a starter would be some skin modification,
like the "printable
version". This would produce an HTML that could be opened in Word.
Not a bad idea per se, but from my experience, Word (or any other word
processor) is horrible at working with HTML - especially if you aim to
re-integrate the resulting edits into the wiki.
If preformatting in pages is desired, maybe a
"print do PDF" would
help. I'd guess there is plenty of software that can convert HTML to
PDF.
The problem with PDF is that it cannot (easily) be modified using a word
processor, thus eliminating the possibility to post-process documents
for page-based layouts.
-- F.