hyperbolic trees examples & background:

http://industry.ebi.ac.uk/~alan/VisSupp/VisAware/VisAware.html#tre


-- 
     "An organization is like a tree full of monkeys, all on 
  different levels, some climbing up.  The monkeys on the top look
  down and see a tree full of smiling faces. The monkeys on the
  bottom look up and see nothing but assholes."    --Tom Schuneman