Windows Identity Foundation (formerly called code name Geneva framework) is a new Microsoft .NET Framework technology that gives developers a programming model and SDK to create new advanced identity capabilities in .NET applications. It provides developers pre-built .NET security logic for building claims-aware applications, enhancing either ASP.NET or WCF applications. Windows Identity Foundation makes it easeir to build richer, more secure applications (cloud and on-premise) without being a security and identity expert. It will boost developer productivity, as a result, and enhance app security through a standard approach to federation, strong authentication and identity delegation.
The RC is available here.
Look for more information about "WIF" coming out of Microsoft's Professional Developer Conference, the week of Nov 16.