 ecosystem}: a fair ecosystem, where all of us actors can play a sustainable role. Currently, we are competing not only, as usual, between operators but also with those new Internet players. In this new eco- system, we are speaking more about co-opetition than competition. 3.2.2 WIMS 2.0 Strategic Lines WIMS 2.0 has defined two strategic lines: Offering Telco capabilities to the Web 2.0 community Exploiting Web 2.0 for telecom services Offering Telco Capabilities to the Web 2.0 Community The main objective of this convergence approach is to offer Telco capabilities from the telecom network to the Web 2.0 community. The final service is actually pro- vided by a Third-Party located in the Web 2.0 world with the added value of the operator. Two general guidelines are considered for this approach: 1. Incorporation of Telco capabilities into Web 2.0 services through open Web APIs, allowing the integration of Telco into Web 2.0 mash-ups. This, potentially applies to any Telco capability, which would therefore be usable by/from any Web 2.0 service. Two different, but interrelated, strategies are proposed here: a. Mash-ups based on widgets or PSEs (Portable Service Elements). Telco appli- cations can be incrusted into Web 2.0 services in the form of Web- widgets, which would be the technology-specific implementation of a PSE. The PSEs provided by the operator (or a Third Party) can be easily integrated by end users into Web 2.0 sites and, once incrusted, they are able to handle the interaction with the operator's open Web APIs, thus, enabling the use of Telco communication capabilities from Web 2.0 sites. Specific application examples are a Call-Me button for Blogger {Blogger} or a more sophisticated Facebook {Facebook} application providing voice and presence services for the members of a group. a2. Mash-ups based on APIs. Once Telco capabilities are exposed through open Web APIs, they can be directly incorporated into any Web 2.0 ser- vice in order to provide complementary functionalities, just like any other regular m