I remarked a couple of days ago on Dave Winer’s observation that the enormous popularity of Wikipedia may represent a new kind of centralization of information. An analysis of the recently disclosed AOL search data, by SEO Blackhat, adds a further gloss to this phenomenon. According to the analysis, the #1 ranked search result garners, on average, 42.1% of all clickthroughs. The clickthrough rate falls off precipitously from there, with the #2 result representing 11.9% percent of clickthroughs. If current trends continue, Wikipedia will likely come to occupy the top spot for a very wide range of topics – in fact, it already holds the top spot for many common terms.