Exchange 2007 SP1 will be released in the second half of this year. A partial list of what you'll find included in this SP is:
Standby Continuous Replication (SCR)
With Exchange 2007, we introduced Cluster Continuous Replication (CCR) for replication of data between 2 servers within a cluster. With SCR, data can be replicated on a per-storage group basis to standby servers or clusters. The SCR target, whether a single mailbox server or a cluster, can be placed inside the primary datacenter or in a remote location, ready to be manually activated if the primary server or datacenter fails.
SP1 will fill in the feature holes that we just didn't have time to complete by RTM:
OWA 2007 SP1 spell checking will add support for:
OWA 2007 SP1 will add support for viewing Office 2007 file formats as HTML.
Exchange Management Console
SP1 will fill in the GUI holes that we just didn't have time to complete by RTM, including:
New web service coverage will include:
On Longhorn Server, we will support Exchange 2007 on native IPv6 networks.
This vital tool administrator tool has been beefed up to include import and export to a .pst
Impact of SP1 on Windows Mobile 6 deployments?
I AM WAITING TO GET SP1, SO THAT THE EXCHANGE SERVER 2007 I CANTRY USING ON WINDOWS SERVER 2008.
I am awaiting the release of SP1 before I implement Exchange 2007 period. After testing it for several months I believe it is seriously more trouble than it's worth. The OWA looks great but come on people...let's see how complicated we can really make life.