It must be Service Pack 1 Week at Microsoft.
Exchange Server 2007 SP1
Service Pack 1 for Exchange Server 2007 has finally gone RTM. This release includes support for Windows Server 2008, enhanced functionality for Outlook Web Access, new administrative tools for Public Folders, and the new Standby Continuous Replication feature for HA/DR.
Forefront Security for Exchange Server SP1
This is an important update for Forefront that is primarily delivering compatiblity with Windows Server 2008 and Exchange Server 2007 SP1, and a rollup of current hotfixes. One of the great new features is the ability to enter proxy details to download antivirus engine updates during setup. The Forefront team blog has a full writeup here.
If you are currently running FSE on your Exchange 2007 servers and considering upgrading Exchange to SP1, be sure to upgrade FSE first.
MOSS 2007 and WSS 3.0 SP1 Preview
Not to be outdone, the SharePoint team has released a preview into WSS 3.0 SP1 and SharePoint 2007 SP1. Again this update will provide Windows Server 2008 compatibility, as well as new AJAX enhancements, STSAdm command options, and a rollup of over 60 hotfixes for the WSS and SharePoint products.