I'd like to see more resource types like the cluster resource type added to the Active Directory computer import.  Currently the rule allows computer, user, print queue, site, subnet, and role and account.  Our AD contains a cluster name which is a virtual computer name for the cluster resource.  It is not a computer; it represent the active node.  These resource types can be found with an LDAP query - (servicePrincipalName=MsClusterVirtualServer*).