I heard about NaNo in 2005, however I never signed up for it. I did this year, and am looking forward to it.
Is it common for everyone to do an outline prior to the start?
I suppose, I guess outlining ahd worldbuilding and character building gives you something to do that works toward the goal and you're not supposed to actually start writing any text included in your novel until the month starts.
I don't outline any of my flash fiction, but I have the feeling a novel is going to be a little different...