Microsoft has released the BizTalk Server 2010 pre-configured VHD and Training Kit to help you get started with BizTalk.
As given on the site “This training kit contains a complete set of materials that will enable you to learn the core developer capabilities in BizTalk Server 2010. This five-day instructor-led course consists of a series of hands-on labs that provides students with the knowledge and skills to develop applications using Microsoft BizTalk Server. The labs focus on how to work with schemas, maps, and pipelines; process flat files; implement transactions; integrate business rules; and more. There is also an option below to download a Virtual Machine that is ready for you to use with the training kit.”