For those of you who haven’t found this site yet, here is the Microsoft area for Exchange 2007.
Interestingly, it appeared earlier today that Beta 2 was available for download, although it now seems to have disappeared.
Still looks like it could be with us very soon 🙂
Another thing which is available is the new Microsoft Forefront Security for Exchange Server. Forefront Security for Exchange protects organizations against the latest threats by managing multiple antivirus scan engines at multiple layers throughout the e-mail infrastructure.
I guess therefore that this is simply the next version of Antigen.
One thing to consider is that it requires 2007 to be installed.