Every award posted on this site seems to go to the man(!) but I have to say Lewis Hamilton, because I know that he's had a bit of luck, but it is the sign of a truly world class driver that he can take an absolute dog of a car and beat everyone but Brawn! If the diffuser row escalates, he could very well have just won the Australian Grand Prix! Yet again, of course, it was proved that he is the best overtaker in F1 given a sniff of a pass and, most satisfying for me, he beat Alonso hands-down from behind on the grid in an inferior car! Hamilton has shown he will not take being in an inferior car lightly and can challenge for the title if and when McLaren get their car sorted.
Honourable mentions:
J. BUTTON
T. GLOCK
J. TRULLI (unlucky)