The document describes a methodology called Idex 2.0 for identifying scientific experts and opinion leaders. The method uses both traditional bibliometric indicators from publications as well as new sources from Web 2.0 like social networks and blogs. While tools like Google Scholar and social media can help identify some experts, paid subscription services tend to be more exhaustive and reliable. The adoption of Web 2.0 by scientists remains limited due to a lack of time and preference for traditional publication channels.