MediaWiki i.e. the php framework used by Wikipedia, and the framework I was using on my last wiki, is actually quite prone to spam and it takes a community to fend of the evil spammers. Obviously, I don’t have a “community” per se so I found a great wiki framework with a lot of bells and whistles and which has quite decent security mechanisms in place. The framework is called PMWiki and one can read up more about it here.
I like PMWiki so much that I got rid of my regular web site and now my new PM wiki is my web site. I do need to spend a bit of time adding more content but I think it already has the “look” I always intended to implement.
So check it out: