Exchange 2010 introduced RBAC as a mechanism to manage access to administrative tasks at granular level which was not possible in previous versions of Exchange.
With release of Service Pack 2 for Exchange Server 2010, you gain few new features such as Cross-Site Silent Redirection for OWA, Address Book Policies, Mailbox Auto-Mapping and few other additions (What’s new in Exchange 2010 SP2).
There is nothing new about this. If you have been reading about Exchange Server 2010 or have it deployed with hardware load balancer, chances are, you have read how to configure static ports on Exchange Server 2010 on TechNet Social wiki for Exchange 2010. Chances are that you have also used my script (referenced in the post above) to set static ports on your servers. Lastly, chances are that you have read all about it on my previous post here.