Google has analyzed over a billion text/html webpages to generate statistics such as the number of elements on pages, popular elements, ids, classes, http headers, editors and other metadata.
You’ll need Firefox 1.5 to view since they use SVG graphs.
Should be of interest to people who write webpages and people who like web standards. Seems like they are also fans of HTML 5 at Google Code.
Among some of the interesting statistics, imagetoolbar and mssmarttagspreventparsing are two of the most popular meta name values.