Carsten Cumbrowski over at Search Engine Journal picked up that Wikipedia is now tagging all their links with "NoFollow". Apparently this is an official decision by Wikipedia's CEO, Jim Wales. I think that is a decision that will eventually lessen the spamming of Wikipedia by those who are gaming it to gain page rank.
However, what if the gaming for page rank isn't the objective? What if it is just to get the link into the article, to get the eyeballs to see it and the fingers to click on it and drive that traffic in? The NoFollow attribute won't mean a thing there.
Also, the NoFollow doesn't mean that the spiders from the search engines won't go to those sites, it just means that Wikipedia isn't giving its "trust" to the link. Although I applaud Wikipedia's steps with the NoFollow, they are still similar to Digg in the aspect that a link from a popular Wikipedia page, means traffic to the website the link is pointing to. There are times where the objective isn't Page Rank at all, it's strictly to drive traffic.
Anything that is community driven always leaves the element of "being gamed" whether its from aggressive marketers, programmers or even from within the community's own walls. We are human, we just want to "belong" and be noted as "important", and that's the lure of being on Digg or Wikipedia. That is something that I don't think Wikipedia's Jim Wales can solve through tagging.