Yahoo has a service / website called "Launch." Launch will play videos & music for you, and you can tell the system if you liked the selection or not. With that information (and comparing it to other users' music taste), Launch will figure out your preferences, and ideally only play pieces that you like, including new ones you have never heard before. It would be cool if a similar system could be used in shopping centers. In most of them, the choice of music is really horrible, and I'm...