Based on previous research and experience on the study of WEB2.0 applications, this book provides a broad introduction to WEB2.0 application, blogging and political blogging. Several methodologies for studying blogs communication patterns through the study of blogs links are presented. After presenting a wide literature review, the book presents and explains how a hyperlink analysis of blogs can be made. Techniques derived from Social Networking Theory and Multivariate Statistics are presented and applied in a case study regarding Greek political blogs. The study analyses connectivity patterns of Greek political blogs using Social Networking Analysis of the blogs and identifies focal conversational points. This book offers both bibliographical information and a set of methodological tools for those interested in studying blogging and communication patterns between blogs.