OK these are addicting. I'm going to do another one of these "speed designs" at home this week. I was interviewed by the University of Calgary a couple months back for a study on design and the creative process (for the magic, nothing for web), and he made some interesting points about speed. When you work quickly, you tend to work more freely. It keeps you from over thinking as you work and lets you try things on a whim.
He also presented another idea that I may try as well. Try and design something so that it is as expensive to produce as possible. From there, when you move into the production phase, you can scale back or find creative solutions to keep certain elements. It forces you to be creative and think outside the box in the initial design phase.
I'm sure PG would do one, but he's probably too scared.
