I have the same problem with iPhone and ActiveSync - it doesn't work anymore.
After installing SP1 for Exchange 2010 I lost my Exchange Management Shell!
Installing SP1 was a mess.
The first upgrade failed when the Unified Messaging Role was updated.
Windows Firewall must be enabled - if not - the Upgrade will fail!
After that enabling the Windows Firewall and re-running the Upgrade setup the upgrade was running fine. But now I have a Exchange 2010 with SP1 - all mobile users with iPhone cannot sync, the Exchange Management Shell is gone and Active Directory settings for the homeMTA attribute for all users was messed. I had to edit each users homeMTA attribute because the Exchange 2010 SP1 Upgrade misconfigured these.