Latest: http://www.w3.org/2001/tag/products/index.html
This version: http://www.w3.org/2001/tag/products/index-2011-10-24.html
The intent of this effort is to identify, document, and promote best practices for designing Javascript, and perhaps other APIs in a manner that will protect users' privacy by discouraging the return of unnecessary information. For example, an API that retrieves a user's phone number should not necessarily also return her address.
We intend to coordinate with the IAB on the review of this.
(Actions linked from product page.)