The diameter of the boost web-site graph is 3

Number of clicks from the home page: 
0	www.boost.org
1	Boost Libraries
1	More Information
1	Boost People
1	Frequently Asked Questions
2	Boost Header Dependencies
2	Compiler Status
2	Formal Review Process
2	Boost Library Requirements and Guidelines
2	Dave Abrahams
2	Darin Adler
2	Call Traits
2	Compose Library
2	Boost Graph Library
2	Property Map Library
2	Array wrapper

The breadth-first search tree:
www.boost.org
  Boost Libraries
    Call Traits
    Compose Library
    Boost Graph Library
    Property Map Library
    Array wrapper
  More Information
    Boost Header Dependencies
    Compiler Status
    Formal Review Process
  Boost People
    Dave Abrahams
    Darin Adler
  Frequently Asked Questions
    Boost Library Requirements and Guidelines
