The main advantage (for me at least) would be the
possibility of
creating/editing pages when an Internet connection is not available
and perform the submits whenever I reconnect to the net.
You might try TiddlyWiki[1] for this purpose.
In particular, you might be interested in the following plugins:
* MediaWikiFormatterPlugin[3]: enables MediaWiki formatting syntax
* MediaWikiAdaptorPlugin[2]: adaptor for moving and converting data from
(not to, due to MW's yet-unfinished API) MediaWikis
HTH.
-- F.
[1]
http://www.tiddlywiki.com
[2]
http://www.martinswiki.com/#MediaWikiAdaptorPlugin
[3]
http://www.martinswiki.com/#MediaWikiFormatterPlugin