For all of you who want to learn about BizTalk, take a look at The Bloggers Guide To BizTalk. It's an initiative of Alan Smith, who collected some great resources available on the net. He put them together in a help file, so you can take it everywhere. Best of all: it's free and available for download on the GotDotNet Workspace (direct link to releases).
"The aim of The Bloggers Guide to BizTalk is to provide the best of the online content produced by the BizTalk blogging community in an easily accessible format. All the content in the guide has been created by BizTalk developers who wish to share their knowledge and ideas with others in the developer community. The subjects of these contributions and the level of their complexity are varied, so there is information available for those who are new to BizTalk, as well as for advanced developers.
The posts are usually taken directly from the contributors blog, so the writing style of the contributions vary, and there is no guarantee that all the information is free of errors. Any feedback as to corrections can be made by commenting on the original article at the authors blog.
All contributions to the guide are gratefully received, and new contributors are always welcome.
The guide will be updated on a monthly basis, usually around the first of each month, the updates posted to the GotDotNet workspace. The guide will always be free to download, and kept up to date as new content becomes available. It is hoped that it will mature over time into a solid resource covering all aspects of BizTalk development at a number of levels."