The article is in the context of the big Facebook lawsuit, but the part about identifying people by their writing style is interesting: Recently, a team of computer scientists at Concordia University in Montreal took advantage of an unusual set of data to test another method of determining e-mail authorship. In 2003, the Federal Energy Regulatory Commission, as part of its investigation into Enron, released into the public domain hundreds of thousands of employee e-mails, which have become an im[...]

via Identifying People by their Writing Style