The document discusses the concept of "Voice 2.0" services, which harness the internet and web functionality to deliver new phone services. It provides examples of current "Voice 2.0" players and how they incorporate characteristics of Web 2.0 like user-generated content, tagging, and network effects. The document argues that telecommunications companies could participate in this emerging space by exposing and adding value to the large amounts of customer data they hold, taking a more "Web 2.0" approach to developing new voice services.