If you've just started to learn about the new server roles that are a part of the Microsoft Office Communciations Server 2007 release, a great post for you to see is over on the Communicator Team Blog by Rui Maximo.

http://communicatorteam.com/archive/2007/11/12/27.aspx

Of course you can find lots of helpful documentation on Office Communications Server 2007 on our TechCenter page http://technet.microsoft.com/en-us/office/bb267356.aspx

-Kevin Engman

 OCS Community Lead