Microsoft published a free PDF about Claim-based Identity, Access Control Service and how to connect it to the remaining Microsoft world (Sharepoint, ADFS, Azure):
I found the announcement today on the blog of Vittorio Bertocci.
More information’s?
If you want to get deeper into the subject you should risk a look on Vittorios Blog. You may be also interested in his Video about Windows Azure Active Directory.
From SAML to JWT
What is not included in the PDF but might become a trend anyway is the renunciation from SAML and to JWT. I recommend Vittorios Blog again and the Windows Azure Authentication Library.
Unfortunately there are not so many sources for information’s about this at the moment so you won’t be able to avoid his blog anyway 