The most famous Backtracker at this time is a romanian.His name is Dumitru Mihai and he used to work for the Spanish government.He created the ultimate perfect keylogger and is a java script master.He is aka <ghostmachine> <romansoft> or <free_of_charges>. He's always a step ahead any security team cuz of his macchanger algorythms.This is his facebook account [link to www.facebook.com (secure)] ,they now hwo he is but no it security team was able to get him.