We have grown so used to credit reference giants like Experian knowing almost as much about us as Google, but unlike Google, they put this information up for sale. This is perhaps why we have forgotten that Experian could form the basis of one of the most powerful personal intelligence systems in the world. And that it is a short step from there to taking away most of Nielsen’s advertising business through advanced advertising decisioning. By asking everyone who supplies you with basic services like broadband, car finance and groceries, and establishing that you are a basically credit worthy person, Experian only has to take on board a few more transaction details, such as buying access to your credit card…