I use this site to give to people in the physical-space and link to online. If I have given you a card in person, it will have an access key printed on the bottom, which will let you view my information and contact me.
The purpose of the CC2.0 is to provide fine-grained access control behind the action of giving someone a card in person. This means that I will be able to control what kind of information to distribute, contact methods, and even make actions on my behalf. For instance, it is possible to make a Facebook friend request to be initiated automatically (without any extra interaction on my part) as part of me handing a business card to you, which would be difficult to automate securely otherwise. The primary limitations for any human-computer interaction that involves social behaviors is due to the need for relative privacy and content between individuals (and user-agents). The goal is to think about how to merge social information and actions in the physical and the digital. Additionally, you will also be allowed to view my private flickr pictures.
Phone numbers, addresses, social networks, (and in the future calendars, profile information, pictures, personal preferences,) etc. are implicit from the URL and Access Key.