What if there was an easy way to aggregate information like my podcast consumption for today:

• 0715-0750: In my car to work [The Bitterest Pill; 4 x Career Opporutnities]
• 1050-1130: At my desk [doing other things … not really focused … ie. perfect for Daily Source Code]
• 1200-1250: On a run [6 x 43Folders; 10 minutes of Doc Searls 90 minute personal podcast (not sure what the point is, I guess it is to be personal with Doc, but I’m not sure I have the time for that. Sorry Doc!); Endurance Radio]
• 1730-1810: In my car going home [projected — Endurance Radio; TWIT]

Across 1000s of like minded people.  A mixture of private and public data collected and distributed in an open-source fashion. And it also tracked other media: DVD, video, TV, web surfing, books, events, etc.   

If it was honest, trustworthy, & transparent, I am pretty sure the current survey and marketing companies would probably not be happy.