Microsoft web world is doing this for a very long time now, publishing short videos ("How Do I ?") that will help users to kick start the concept quickly rather than going through tons of articles. BizTalk has entered this arena recently (relatively!!). Here is the URL for "BizTalk How do I?" video http://msdn.microsoft.com/en-us/biztalk/dd849956.aspx
A picture is worth 1000 words, most of us know BizTalk team is been publishing posters that explains specific part of the product architecture in detail. There are lot of updates and new posters from the team. You can grab it from the following URL?s:
BizTalk Server 2009 Posters
BizTalk Server 2006 R2 Posters
BizTalk Server 2009 Posters on MSDN
BizTalk Server Posters on Microsoft.com
Don't forget, you can also get to the posters easily via biztalk247.com link http://www.biztalk247.com/posters.aspx
Nandri!
Saravana