You may have just notice that I accidentally posted 2 q&a's with Johanna Rothman on this blog ... that's one of the problems with being a big dim and having more than one blog. My apologies.
That said, Johanna's Hudson Bay story is a keeper. You can have a quick look at it on the agilethinkers.com blog. It only takes a moment and you'll learn (or reacquaint yourself) with a very useful principle of project management.