Just came across the release note from Cisco and VMware about the latest version Nexus 1000V R1.2 for VMware vSphere 4. According to the original blog there are new improvement on the area below

  • GUI setup following software install
  • Layer 3 control between VSM and VEMs
  • Virtual Service Domains for classifying and separating traffic for network services
  • iSCSI Multipath—supporting multipath feature introduced in vSphere 4
  • XML API for developing client apps for managing/monitoring the Nexus 1000V
  • DHCP Snooping for validating DHCP messages and filtering invalid responses
  • Dynamic ARP Inspection for validating ARP requests and responses
  • IP Source Guard for filtering traffic on interfaces to valid MAC and IP addresses
  • MAC Pinning for assigning Ethernet port members to particular port channel subgroup (where upstream switches do not support port channels)
  • Static Pinning

There are more new features in the latest release and please read more from here.