Interesting news this week: Microsoft, SAP, and Siemens have been awarded the SAML interoperable certification for their SAML 2.0 products for the first time. From a customer perspective this excellent news – cross-vendor certifications by independent third parties are a good decisions tools for selecting products. While even a comprehensive test suite cannot guarantee perfect interoperability, it puts the responsibility for debugging the most blatant problem into the court of the vendors.