My name is Stas Kondratiev and I've recently worked with the most amazing :-) Microsoft's product - BizTalk Server 2004. Despite the fact that you'll get a standard documentation out-of-the-box after installing BizTalk, it's not enough to get understanding why everything works the way it does. So here's the list of the best (IMO) information on the Internet:
So put yourself into the amazing and interesting world of BizTalk and take care!
Oh, by the way, if you can read Russian you're welcome to visit my Russian blog.