Wiki tools are not all the same
If you’re looking to standardize, here’s a better approach. Inventory the business purposes of wikis in your enterprise that have seen success to date—or are likely to thrive in the future—and then assess the strengths and weaknesses of available tools. You’ll want to assess incumbent solutions, but also keep an eye on the broader marketplace, especially if you’re thinking of exposing any wikis beyond the firewall.
Wikis are "old" by social computing standards, but wiki technology continues to evolve. Do your research to make the right long-term choices.
THE WIKI MARKETPLACE
Major platform vendors: Google, IBM, Microsoft, Oracle and SAP.
Social software suites: Awareness, blueKiwi, Jive, Telligent, Traction and many others.
Pure-play wiki products: Atlassian, MediaWiki, MindTouch, Socialtext, TWiki, Wetpaint and many others.
(Source: www.cmswatch.com/Social/Vendors)