An anonymous reader writes: Many new applications do a great job of making it easy and free for you to post your information online. In a lot of cases, your data is combined with other people's data, to pull helpful or interesting relationships out of aggregate data. This shift has many implications for privacy, and it is worth wondering what the future of privacy is for web application users. A security breach on one of the most popular hosted web applications could easily reveal private information about thousands or even millions of the site's users. How should a user of these applications think about these risks?