I remember thinking not too long ago. "Doc is having a typical awesome season, but it looks like he'll fall short of winning the Cy Young award, due to crazy-good seasons from a few players, such as Ubaldo and Carpenter".
However, I looked at the stats recently, and it looks as though Halladay may now be the leader, in terms of Cy Young candidacy (unless W-L is the most important stat to voters). Still lots of baseball left to play, but so far...
Halladay 12-8 ERA 2.21 171 IP 149 K
Wainwright 14-6 ERA 2.23 153 IP 142 K
Jimenez 16-2 ERA 2.67 141 IP 126 K
Carpenter 11-3 ERA 2.93 156 IP 128 K