Single Sign-On from Active Directory to a Windows Azure Application Whitepaper
Solution ·A new whitepaper on how to connect to Windows Azure hosted applications using Active Directory has been published in December 2010.
The two major building blocks are WIF & ADFS.
I did cover this topic in a series of blog last summer. Now you have a nicely packaged whitepaper explaining it!
Also, Microsoft has published a series of how-to guides on ADFS 2.0.
Federating identity has never been easier!