Again, Gary with the early scoop yesterday on Web Authoring Statistics. This is a break down of "popular class names, elements, attributes, and related metadata" of "slightly over a billion documents" in December 2005.
Note: You will need a browser with SVG and CSS support to view the result graphs correctly. We recommend Firefox 1.5.
There are some really cool figures represented in the study.
Forum discussion at Cre8asite Forums.