Looking for a stable open source wiki platform that has a WYSIWYG UI
that allows building tables.  Want something that works with
php/apache and stores wiki pages as either files or mysql database. 
Needs to have some sort of version history like pmwiki (which is nice
but not WYSIWYG).  www.editme.com looks good in terms of WYSIWYG but
its page history is much worse and it's not open source.

a google search on wysiwyg wiki brings
http://c2.com/cgi/wiki?WysiwygWiki which links to
http://c2.com/cgi/wiki?PerSpective which links to
http://www.high-beyond.com/ which I have tested and it looks very
nice. With page history.

There are others listed at the first link above, including the one
(www.mediawiki.org) that runs the wikipedia.

perspective is a .net solution, only runs on IIS