notable quotes from the story:

Wikipedia has just surpassed three million articles, that freewheeling ethos is about to be curbed.

“flagged revisions,” will require that an experienced volunteer editor for Wikipedia sign off on any change made by the public before it can go live.

The new system comes as some recent studies have found Wikipedia is no longer as attractive to first-time or infrequent contributors as it once was.

“It is a test,” said Jimmy Wales, a founder of Wikipedia. “We will be interested to see all the questions raised. How long will it take for something to be approved? Will it take a couple of minutes, days, weeks?”