If the answer is a loud and resounding , "YES!" then you are not alone.
I hear from reliable sources that the new StarWind Software release will have this capability in it and will enable WAN separated clustering of file services as well as other services.
How? I am glad you asked. From what I have seen, the software will perform the replication and control it and also provide a single user interface for iSCSI so that the cluster can point to a single iSCSI target source and if it fails, the replica will continue to run and allow access via the single name.
Yes, it is that simple, but I am sure the software is not that easy to develop.
Watch for the official news in the next couple of days.