Who is John Galt?

I am so happy to see that the sales of Ayn Rand's book Atlas Shrugged is exploding. So I am writing today to ask that if you have not had the privilege to read Atlas Shrugged then please go get yourself a copy and see for yourself how good a book it is. You may also be surprised that a book written over 50 years ago is mimicking the world of today in almost complete accuracy.

I have read the book 3 times and have listened to the audio book at least another 3 times.

Here are some youtube links related to Atlas Shrugged:

http://www.youtube.com/watch?v=YNiJc7yxKHg
The John Galt Speech: Part 1 - 5 on Youtube