Allow you to set mappings by record type, not just by object.
It would be very helpful to be able to map record types.
My use case is that we have 2 different account record types, one has a billing address and the other has a shipping address. Because they are all Accounts I can only set the mapping to one set of addresses. You can't create a new address field in Salesforce so I can't set up a work around formula field that picks the right address to use.