The official SQL Server AlwaysOn team blog.
Failover Cluster Instances as well as Availability Groups have some great features coming up in SQL Server 2014.
Take a look at Luis' post on what you can try out with publicly available CTP1: http://blogs.technet.com/b/dataplatforminsider/archive/2013/06/27/alwayson-in-sql-server-2014-ctp1.aspx
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Thanks Sanjay for sharing reference.
Do you know if 2014 AlwaysOn Groups will be interoperable with 2012 instances so that a primary and a secondary are not necessarily running the same version.
To be specific, can we have
Primary in 2012 and Secondary in 2014 or
Primary in 2014 and Secondary in 2012