Christophe Lemaitre
The 22 year-old Frenchman was the 1st white person to break the 10-second barrier in an officially timed 100m event. A few days ago he came first in the 200m at the London Grand Prix in 19.91s, the 3rd fastest time for 2012 behind Blake and Bolt. With the world's attention focused on Bolt, Blake, Gay & Powell, Lemaitre is my dark horse for a silver in either event.