Try these virtual labs to learn more about BizTalk Server 2010.
MSDN Virtual Lab: BizTalk Server 2010: Examining a BizTalk Application
MSDN Virtual Lab: BizTalk Server 2010: Creating a BizTalk Orchestration
MSDN Virtual Lab: BizTalk Server 2010: Creating Transactional Business Processes
MSDN Virtual Lab: BizTalk Server 2010: Monitoring Business Activity
MSDN Virtual