Neetu Rajpal, the Group Program Manager for the Forefront Sever Security team at Microsoft recently wrote this article on Forefront Security for Exchange Server. In her article she describes some of the capabilities of the next generation Forefront Security for Exchange Server. With multiple scanning engines and filtering capabilities, the product protects e-mail while allowing you to take performance into consideration. You can also handle configuration and management as you prefer, using either the administration console or Windows PowerShell.
Check out her article on TechNet here.