ability to do (a)sync replication from 1 to many, however this may be difficult due to the use of drbd.

example:

mirror a volume locally for local failover (nas or iscsi), and than mirror that volume to a remote location for disaster recovery purposes. Datacore i$ pretty good at thi$ today.

thin provisioning for iscsi and nas volumes.

dedupe, all storage vendors are racing to get this feature added to their product if it doesn't exist today.

nas failover as mentioned above.

I'd like to see a clustering approach like Equallogic and lefthand, and yes, my customers are willing to pay for it so I'm willing to pay for it.

tom