This is amazing:
"Imagini has an interesting technology called VisualDNA which effectively works out people’s personality types by presenting them with picture choices - instead of asking users to log in and type in their profile. The Flash-based quiz is not unlike a game, and can be quite addictive once you get going. The result is that Imagini says online retailers get a 37% uplift from customers after they get profiled. So whether you picked the Grand Torino over the Lamborghini really does say something about you."
You can see how the whole thing works here. I would love to see more information about this approach (in particular, more data and research reports on validity and reliability of this method.)
