Exchange 2010 SP1 beta Prerequs

I have been playing with the Exchange Server 2010 SP1 beta in my test lab.  Thus far, I'm pretty impressed.  It upgraded my lab servers cleanly.  I upgraded a 2 node DAG nicely as well.  I'm using Windows Server 2008 R2 (fewer prereqs that have be installed.) 

There are  few hot fixes that you will need to install, though. 
http://code.msdn.microsoft.com/KB979533
http://go.microsoft.com/fwlink/?LinkId=183148