It looks like the Microsoft Forefront Server Security team has a new blog up:

Hello all and welcome to the new blog for the Microsoft Forefront Server Security products. Many of you may be familiar with and/or running our products under one of our previous handles. Whether you are a long time Sybari Antigen user, a recent Microsoft Antigen user, or a brand new user of Microsoft Forefront Security for Exchange Server 2007 and/or SharePoint 2007, this is the place for you to get information straight from the team of people that deliver the product line to you.

It looks like they are going with the tried and true "default theme" for now, but we'll see how the blog fleshes out over time... :)

What is Forefront Server Security?  There is a nice overview here: http://www.microsoft.com/forefront/prodinfo/overview.mspx