Currently many initiatives are being proposed for identity management, such as OpenID, SAML, CardSpace/Information Cards, and OAuth, as its importance is becoming apparent. Identity management is as an integral part of service infrastructures to make identity available to services across organizations in a secure and privacy protected manner. The identity data are crucial to successfully providing the privileged and personalized experiences for legitimate users of services. Also it is important that the users should have strong control over their identity data to foster a socially responsible service industry. This talk will give an overview of trends in identity management, and illustrate best practices and lessons learned in real settings using case studies. The talk will also highlight standard harmonization (SAML/Liberty, OpenID, CardSpace/Information Cards, etc.) and explore the future research agenda (e.g., mobile applications).