How would a developer use Access Control with AD FS 2.0 & WIF?
ACS, WIF, and AD FS v2 can be used together to develop web services that combine the security and capability of Active Directory with the flexibility and control of custom access control rules, within a simple, closely integrated developer experience. Access Control allows developers to manage access to RESTful web services using a cloud-based service. Active Directory Federation Services 2.0 can federate with ACS, so users in Active Directory can be granted access to these RESTful web services.