Wikipedia And The Death Of The Expert is an interesting and somewhat lengthy look at Wikipedia and expertise. I found it interesting mostly for its look at what Wikipedia is and does, including this from near the beginning of the essay:
It’s been over five years since the landmark study in Nature that showed “few differences in accuracy” between Wikipedia and the Encyclopedia Britannica. Though the honchos at Britannica threw a big hissy at the surprising results of that study, Nature stood by its methods and results, and a number of subsequent studies have confirmed its findings; so far as general accuracy of content is concerned, Wikipedia is comparable to conventionally compiled encyclopedias, including Britannica.
There were a few dust-ups in the wake of the Nature affair, notably Middlebury College history department’s banning of Wikipedia citations in student papers in 2007. The resulting debate turned out to be quite helpful as a number of librarians finally popped out of the woodwork to say hey, now wait one minute, no undergraduate paper should be citing any encyclopedia whatsoever, which, doy, and it ought to have been pointed out a lot sooner.