Technet has few How-To-Do videos based on Exchange 2010 which is worth having a look at. The Exchange team has started a series of Exchange 2010 webcasts as well.
Check the ExchangeTeam blog for more info.
- Getting Started with Archiving in Exchange 2010
- Getting Started with Remote Management
- Getting Started with Message Retention in Exchange 2010
- Getting Started with Message Discovery
- Introduction to Exchange 2010
- Get Started with Role Based Access Control
- Get Started with DAGs
- Create and Configure Certificates
- Transitioning from Exchange 2007 to Exchange 2010 Part 1
- Transitioning from Exchange 2007 to Exchange 2010 Part 2
- Transitioning from Exchange 2007 to Exchange 2010 Part 3
- Coexisting Exchange 2010 with Exchange 2007
- Securely publish Exchange 2010 using ISA Server 2006 SP1