Usain Bolt definitely made history at the Olympic Games becoming the world record holder simultaneously at 100m (9,69) , 200m (19,30) and 4 x 100 m relay (37,10) beating times that once nobody tought they could be beaten like Michael Johnson's 19,32 in Atlanta.The man had like over 37 km/h ; 10,3 m/s , incredible; and he can do more. I think he can run in the 9,5 s and under 19 secons, time will tell.
Some people may doubt his performance, but i think he is clean, and this is due to the times that he had run as a junior:
In 2001 at the Junior World Championships in Debrecen he run 200m in 21,73 at only 14 years and 11 months and later became the junior world record holder at 200 m being the first to run under 20 seconds in 2004 in Devonshire with 19,93 at only 17 years.

For me he is the man of the Olympics, and here are some more photos of him in action: