Article by Dan Farber overviewing some recent developments in federated identity management. Interestingly, he does not mention Shibboleth.
The most interesting and promising development I encountered at Digital ID World was Ping Identity. The 12-person company, led by CEO Andre Durand, offers SourceID an open source platform for deploying federated single sign-on or enabling federated identity applications. The platform is technology neutral, providing support for SAML, Liberty Alliance, WS-Federation and WS-Security. The SourceID Federation Platform Java and .Net flavors and support the Phase I of the Liberty Alliance Protocol. The company also has a proof of concept of a WS-Federation version. [Federated identity, PingID and standards cartels - TechUpdate - ZDNet]