According to Don Schmidt Microsoft is finally going to support SAML 2.0:
At the Professional Developers Conference this week Microsoft is announcing the beta release of “Geneva”, the codename for its new claims based access platform. This platform helps developers and IT professionals simplify user access to applications and other systems with an open claims-based model. “Geneva” helps developers to externalize user authentication and identity processing from application code by using claims that are obtained with pre-built security logic that is integrated with .NET tools. “Geneva” helps IT professionals to efficiently deploy and manage new applications by reducing user account management, promoting a consistent security model, and facilitating seamless collaboration across departmental, organizational and vendor boundaries. User access benefits include shortened provisioning lead times, reduced accounts, passwords and logins, and enhanced privacy support. “Geneva” implements the Identity Metasystem vision for open and interoperable identity, and includes built-in support for standard federated identity protocols.
A fundamental goal of “Geneva” is to extend the reach of its predecessor, Active Directory Federation Services, and provide a common identity programming model for developers of both web applications and web services. To maximize interoperability with clients and servers from other vendors, it supports the WS-Trust, WS-Federation and SAML 2.0 protocols. To maximize administrative efficiency “Geneva” automates federation trust configuration and management using the new harmonized federation metadata format (based on SAML 2.0 metadata) that was recently adopted by the WSFED TC.
This is very interesting. It looks like in the Geneva release what was ADFS will now support SAML 2.0 along with WS-Federation. It also looks like Cardspace, Zermatt, and ADFS are going to be combined into a single “platform”.