I was speaking with some customers today about on-line training available for BizTalk Server 2004, and wanted to remind you all that there are some convenient Virtual Labs for BizTalk available online, for a very nominal charge (free!) 

It's simple — no complex setup or installation is required to try out BizTalk running in the full-featured MSDN Virtual Lab. As part of the MSDN Virtual Lab, you will have full access to BizTalk through the following modules:

You get a downloadable manual and a 90-minute block of time for each module. You can sign up for additional 90-minute blocks at any time.