The next step in music enjoyment

Despite the catcalls of the haters, the iPod does greatly improve your ability to access and enjoy your music. The next step should bring in the preference information as used by Yahoo Music. A really great device would store music but would modify the shuffle based on the preferences of those listening. So when I wear it, you get my faves and when someone else wear's it they get their's. When plugged into car stereo or home stereo, you should be able to plug in multiple stored preferences, so that when Jane, Bob and Mary Lou are listening, the system balances all preferences. We can't be that far away from this.