Following the release of Forefront for Exchange Server with Service Pack 1 (download here http://www.microsoft.com/downloads/details.aspx?FamilyID=2ceb14d4-404b-4d8f-8a21-ebfc71b2e82b&DisplayLang=en) a new management pack for monitoring this is available for download here http://www.microsoft.com/downloads/details.aspx?FamilyID=ec2a6c3a-6d75-44df-87d7-9dbb3dbfce37&DisplayLang=en

This MP is a new Opsmgr07 release specifically for Forefront for Exchange Server with Service Pack 1 and not an MP upgrade of the Microsoft Forefront Server Security for Exchange 10.0 Management Pack (http://www.microsoft.com/downloads/details.aspx?FamilyID=147d908c-9dc4-4f90-81b2-ee0764300be2&DisplayLang=en)