In case you don’t subscribe to the Exchange team’s blog, today they announced rollup 8 for Exchange server 2007 SP1. You can read their announcement here. If you are running Windows Server 2008, you will now be glad to know rollup 8 automates the kernel mode authentication configuration required for CAS servers. Slowly Microsoft is swatting all of the server 2008 issues.
Also in the pipeline is Exchange 2007 SP2, so keep your eye out for that as well. SP2 will be required if you wish to migrate to Exchange 2010.