Now that BizTalk Server 2006 has released to manufacturing (YAY!), we have posted the final copies of the Installation and Upgrade guides. We have also posted the tutorials in .doc format. And if you are still not excited, the full documentation will be released to MSDN soon!
Installation and Upgrade Guides
The installation instructions explain how to install BizTalk Server 2006 on Windows XP, Windows 2000 Server, or Windows Server 2003 in a single server or multiserver environment.
The BizTalk Server 2006 tutorials contain detailed steps for implementing simple scenarios to give new users an experience of using a variety of BizTalk tools while creating compiled, testable solutions.