I am using MoinMoin since many years (started before 1.0) and have set up some Wikis for the Intranet in "my" institute Leibniz-Institut für Katalyse e.V. (former "Institute for Applied Chemistry Berlin-Adlershof").
Here is the design I've created for our internal wikifarm:
/Sinorca4Moin (Please put theme-related comments on the theme page - Thanks!)