HP StoreVirtual 4000 is the platform that does what you're looking on FC. HP P4000 family, formerly know as Lefthand, could do this years ago, on iSCSI.
HP StoreVirtual operating system (also known as Lefthand software, or SAN I/Q) allows distributed storage devices to be linked together into a network RAID pool. Depending on the network RAID you choose to use, AND in case the the storage devices are <3ms far on the network (e.g.: same rack, or two different sites with a fast connection), you can build a storage infrastructure that is physically in two different sites, while the storage infrastructure is considered as just one pool of storage devices: a single storage infrastructure with syncronous read-write capabilities. this means that if a site crashes, the other is online and available to the servers. Zero downtime.
While two HP EVA are two different storage devices (syncronized by an additional software layer), an HP StoreVirtual architecture is, by definition, a distributed network raid pool of n storage devices that continuously communicate one to each other. Building a redundant and n-"active" infrastructure.
The software part that does the magic is build into the HP StoreVirtual storage devices themselves and is the operating system itself (Lefthand operating system, that is SAN I/Q), so the High Availability and Disaster Recovery features of the storage system are "for free", included, into the cost of the hardware (storage). Wiht an EVA device, you need to buy the additional software that sincronizes two different units.
Vmware integration is 100% (application consistent storage snapshots are driven by the StoreVirtual devices that "stop" the VMware server infrastructure while they're executing them, for instance).
find infos on HP StoreVirtual products here: http://www.hp.com/go/storevirtual
StoreVirtual operating system software capabilities are available also into a virtual machine that you can load into your virtualization environment, called VSA (Virtual SAN Appliance).
If you execute that virtual machine into your environment, ANY storage you already own (internal disks, as well) will be configurable as netowrk RAID HP Storevirtual disks and considered part of a distributed pool, with all the advantages of making remote copies, clones, snapshots, thin provisioned LUNs, ... that the lefthand operating system offers.
With the HP StoreVirtual VSA (Virtual SAN Appliance) you can transform whatsoever storage you own into a lefthand node. Of course, performances will NOT be certified on the hardware you own. High transactions environment will need to rely on a certified hardware architecture (the HP StoreVirtual devices themselves).
HP designed three different architectures called Virtualiazion Smart Bundles that you can use as working examples of virtualized infrastructures. One uses HP StoreVirtual VSA, to build HA architecture on VMware. Find it here: http://h18004.www1.hp.com/products/solutions/virtualization/virtvmware.html
VMWare certifies (please notice: it's VMware that certifies it) that the HP VirtualStore VSA support Vmware's metro cluster features on iSCSI. This really means, it's really working as expected (!).