That title isn't meant to be rhetorical. I really don't know where to go for my daily news. I guess I didn't realize how much I rely on it. It is a good reminder of how what we think and what is true are not always the same. If you asked me, I probably would have said that I use it sometimes but it isn't essential to my daily life. The reality is that it truly is essential.
I have to pack some kind of User Experience lesson in here, so here goes. Don't trust what user's tell you. They become so unaware of the things that use all the time that they take them for granted. Anyone who looked over my should on any given day, they would probably notice that every time I am doing a build (which takes a couple of minutes), I switch over to my browser window which always has the first tab open to http://thoughtfaqtory.com/flex/mxnaviewer/.
So keep that in mind when you want to find out how users actually use the software you build. Just remember to ignore what they tell you and pay attention to what they show you.