Whats a social graph and how do I open it?

1. Defining what the graph is...

1.1. Giant Global Graph

1.1.1. "above the level of documents"

1.1.2. "break free of the document layer"

2. Opening the social graph...

2.1. Single sign in

2.1.1. openID

2.2. Data portability

2.2.1. OAuth

2.2.2. BBAuth

2.2.3. Microformats

2.3. Profile Linking

2.3.1. XFN

2.3.2. FOAF

2.3.3. "URLs are people too"