A new generation of vShield products have recently started in a public beta.
vShield App 1.0 dynamically protects applications within the virtual data center (vDC) from internal threats by ensuring proper segmentation and enforcing rules on business-defined Security Groups.
vShield Edge 1.0 provides a set of perimeter services akin to a DMZ, protecting a customer virtual datacenter or organization and intended to be the boundary between the Service Provider (internal or public) and a tenant organization. vShield Edge also provides network services such as DHCP, VPN, NAT and load balancing.
For more information and links to join the beta, please see this blog post: