Wikis that use MoinMoin:
this one
YasushiIwata's Home Page (Japanese - gives a 404 error ... should be deleted?)
CultureWiki (online again, but still dead)
TrikiWiki (private wiki for the Transformers holiday - uses a mildly hacked MoinMoin)
Keiteedot (Slash like wiki in Japanese)
WikiArea (Japanese)
For more wikis, see the InterWiki list.