The actual sensible way to do this is IP encapsulation over FibreChannel
SCSI. An IP stack for Fibre Channel is a big pain in the ass. Target Mode
for Fibre Channel is pretty easy. In fact, I'm about half ported for this
into this sillyass Qlogic driver. You get a very large address space,
don't have to worry about ID conflicts, and while it isn't as cheap as
parallel SCSI, it isn't all *that* expensive and you get 1024Gbit
transport with a 2k framesize (but no particular reason why can't layer
arbitrary MTUs on top of that).

-matt