It seems odd that the author of this article would make specific mention of Wikipedia, the biggest wiki project in existence at present, but when discussing wiki software completely fail to mention MediaWiki. MediaWiki is the wiki software in use by Wikipedia and other Wikimedia Foundation projects. In my meanderings online, it's also the wiki software that I've most commonly stumbled across in other locations.

In other news, I tend to agree with the sentiment of this article. I'm quite of the opinion that, for most purposes, a wiki would be better suited to internal governmental use. Excepting in the case of specific public relation presentations (such as an "official blog of Senator Such-And Such"), I wouldn't recommend either form of expression for any external governmental use.