Lost in the “KeyNot” (no the “e” is not missing) at TechEd EMEA, Exchange 2010 is now RTW.  It’s up on TechNet and MSDN.  It looks to me (as a non Exchange person) that lots of little stuff is in there for the users.  For the IT Pro’s there’s lots of changes to allow for more scalable storage at a lower price (SATA disk for mailboxes) and greater fault tolerance (DAG’s and CAS fault tolerance).  All that remains now is SharePoint 2010 and Office 2010 to complete the package.