I've used a simple wordpress wiki theme called "KnowHow" for a lot of clients, if you're looking for an easy-on-the-eyes setup that's easy to maintain. I've use

I've used a simple wordpress wiki theme called "KnowHow" for a lot of clients, if you're looking for an easy-on-the-eyes setup that's easy to maintain. I've used it for small business's sites and I've also used it to set up an internal KB for a nation-wide shoe retailer while working in their IT dept... with a couple tweaks and plugins you can setup some pretty decent workflows and approval steps for authoring.