We just installed our new OpenStorage from Sun, consisting of an X7310 RAID (zfs) Storage Controller and a 4400 JBOD case (for SAS).
The X7310 has a 10 GE Ethernet card installed additionally, the lower half is filled with 11 1TB SATA disks and a 16 GB log flash device.
Sun OpenStorage appliances are special OpenSolaris versions installed with a web (and terminal) interface to configure ZFS file systems and block devices (ZVOL) to share them via iSCSI, NFS and CIFS to other SAN members.
The X7310 has a 10 GE Ethernet card installed additionally, the lower half is filled with 11 1TB SATA disks and a 16 GB log flash device.
Sun OpenStorage appliances are special OpenSolaris versions installed with a web (and terminal) interface to configure ZFS file systems and block devices (ZVOL) to share them via iSCSI, NFS and CIFS to other SAN members.
I'll write more on the configuration and the diagnosis functions the next days.
The devices are running and came up in our test lab without errors, the zpool was created.
More to come.

So you can hook these things up to an existing fiber SAN?
No, the OpenStorage cannot be used as FC targets. They concentrate on offering iSCSI as a block level SAN protocol.
It seems that Sun eerrrh Oracle does not focus any more on a fiber channel SAN. They push actively iSCSI to be used as SAN protocol.