There is no doubt that a WIKI page can help with credibility. Many media will use Wikipedia as their go to source for information and background data on individuals. I looked into it but the process was a nightmare so I gave up.
Then a friend of mine started a smart business called WikiWorthy. Basically they assess whether or not you will be able to have a Wiki page and then if you get a thumbs up, they will actually put the page together, doing all of the steps that most of us would find way too time consuming and frustrating.
This is a great service, perfect for authors, speakers and key people of influence. If this is something you might be interested in (and they have a very reasonable pricing structure), check out their website – www.wikiworthy.com.au.