Interesting theory that says we are all connected in six steps or less.
http://en.wikipedia.org/wiki/Six_degrees_of_separation
what examples can you think of for yourself?
for me i can say i'm 3 steps away from President Obama.
Also using http://oracleofbacon.org/ can show you links between actors (and if you have a friend on imdb, you can use them and just add one to the result)