Mary Kirkland has done a super job with this book. The "One Microsoft Way" of doing things in their DNA architecture (which is simply a way of incorporating Internet technology into their scheme of things) has often been, shall we say, confusing.
This book brings everything together, ie. COM,MTS,COM+(which will see the quick demise of MTS as we know it),ASP,MSMQ etc.
I would say to anyone who wants an overview of all this should buy this book now. It is a book I keep going back to as we all know that COM can be rather complex. Working through the Island Hopper example included in the book, is also a great help to see things up and running.
A good reference, that you come back to again and again.