BizTalk Server 2006 Updated Documentation Available

If you didn't notice, Luke Nyswonger, lead programmer writer for BizTalk, just updated the downloaded CHM BizTalk 2006 documentation build. It's absolutely outstanding. Honestly, this is the best product documentation I've ever seen for a Microsoft product. It has so much depth on planning exercises, architecture, performance, engine guts, security and much more. If I go into any of my SoCal BizTalk accounts, and this file isn't sitting on the developers' workstations, I might turn around and go back home!