Mathew Ingram writes:
Amazon, in a potentially controversial move, has started collecting information on what readers highlight in the e-books they’re reading on the company’s Kindle reader, and sharing it with others. The service doesn’t say which sections of which specific books a reader has highlighted, but it aggregates that information and displays it — including the most popular passage of all time, a selection from one of Malcolm Gladwell’s books. Judging by the initial reaction from Kindle users, some feel that Amazon may have crossed a line, although others seem to like the idea.
Read more on GigaOm.