WDVL: P3P - Platform for Privacy Preferences
P3P - Platform for Privacy Preferences

P3P is a system for making Web site privacy policies machine-readable. It's been around for a while now and is a W3C recommendation, yet still isn't very popular. One reason is that it's technically quite complicated, requiring an XML file and additions to HTTP cookie headers. Here's a quick introduction.
http://wdvl.internet.com/Internet/Security/P3P/