Azure AD sync is now available – download from http://www.microsoft.com/en-us/download/details.aspx?id=44225
AADsync builds upon a solid metadirectory synchronization platform.
The following sections introduce the concepts for metadirectory synchronization.
Building upon MIIS, ILM, and FIM, the Azure Active Directory Sync Services provides the next platform for connecting to data sources, synchronizing data between data sources, as well as the provisioning and deprovisioning of identities.
AADSync Technical Concepts
More Information and Documentation on http://msdn.microsoft.com/en-us/library/azure/dn790204.aspx