  Although the expression “Web 2.0” is now commonly used to differentiate the current Web environment from the early Web, critics point out that this expression is somewhat vague or imprecise. Whereas the early Web (sometimes referred to as “Web 1.0”) has been described as an online environment that was essentially passive or static, in so far as one could simply view the contents of a Web site that had been set up by an organization or an individual (e.g., when one visited someone’s “home page”), Web 2.0 is more dynamic in that it supports many interactive or “participatory” features. In a Web 2.0 environment, for example, users can interact and collaborate with others in ways that were not previously possible. These collaborative features include wikis (with Wikipedia being the best know example), as well as blogs and social networking applications (such as Facebook and Twitter). Of course, the relevant question for us to consider is whether the Web 2.0 environment itself either changes or significantly affects the functions of search engines and, more importantly, the ethical issues they generate.