A to Z(ee) with P3P
http://www.contentwithstyle.co.uk/Articles/60/a-to-zee-with-p3p/

Willerich, Matthias
Content with Style

Abstract:

When you build websites that rely on cookies and they are expected to work with privacy settings other than default, you’ll have to deal with P3P. Read on to find out about the cornerstones of the Platform for Privacy Preferences, and get your hands dirty with an example guiding you from empty hands to a complete basic implementation.