If you are responsible for a highly available Exchange 2007 environment this is the one to watch to learn the new SP1 features.
8 June 2007: TechNet Webcast: High Availability in Microsoft Exchange Server 2007 and Exchange Server 2007 Service Pack 1 (Level 300)
Simulcast from Microsoft Tech·Ed 2007 in Orlando, FL.
E-mail has become mission critical for large and small businesses alike. Businesses and organizations of all types simply cannot afford the extended outages of disasters like failed disks, corrupt databases, failed servers, or power outages. The built-in high availability solutions in Microsoft Exchange Server 2007 and Microsoft Exchange Server 2007 Service Pack 1 (SP1) can make recovery from many disasters barely noticeable to end users. Learn how local continuous replication (LCR), cluster continuous replication (CCR), standby continuous replication (SCR), and single copy clusters (SCCs) provide fast recovery for events that used to be called disasters.