The Chinese wall between PII and cookies - the Wall, what is the Wall - is a ripe area for the IAB and the NAI to own and clearly message what it is that is NOT being used. The premise of using data to effect commerce is no different than anything else in our capitalist world which everyone benefits from including the privacy advocates.
Efforts by the IAB and other acronyms are first steps in trying to inform about legitimate privacy concerns. Still, companies like Axciom and Datran Media need to be able to say for articles such as today's in the NY Times that they follow the clear and precise X, Y and Z guidelines of the IAB/NAI/etc.
If a consumer, the media or the government has a question about how anonymous cookie tracking works, the interactive ad industry should agree on it and then make it available in clear terms. In addition, benefits to web advertising need to be explained and championed such as access to an incredible range of content and services that, unfortunately, many in Congress will never use or understand.