It goes without saying, although I'll say it anyways, this is highly subjective and is merely my (well-thought-out, compelling, coherent) opinion.
That being said, I encourage that you provide feedback (and your selection, if you disagree) in the comments' section.
So, let's begin with the N.L. Cy Young Award.
The N.L. Cy Young Award goes to ... (drum roll, please) ... Matt Cain, San Francisco. With a 9-1 record, Cain is one of three nine-game winners in the N.L. Chad Billingsley (Dodgers) and Jason Marquis (Rockies) are the other two. He's also third in ERA (2.39) behind Johnny Cueto (Reds) and Dan Haren (D'Backs).
In his past five starts, Cain is 5-0 with three complete games. His three complete games lead the N.L. In his past five starts, he has 34 strikeouts in 35 2/3 innings pitched. During that span, Cain has an ERA of 2.02.
With the exception of a five-inning performance in a 4-1 win over the Nationals, Cain has pitched six (or more) innings in every start.
Runner-up: Dan Haren, Diamondbacks - Haren leads the NL in innings pitched (101), strikeout-to-walk ratio (7.38), WHIP (0.82), BAA (.193) and is second in ERA (2.23). He is tied for third in strikeouts (96) with Chad Billingsley. He's pitched six (or more) innings in every start and he has only allowed more than three runs in one start (May 23rd).
While he has a mediocre win-loss record of 6-4, it's not his fault. He allowed only seven runs in 26 innings, which is an ERA of 2.42, in his four losses. His team gave him two runs (total) in those four losses as support. If only he and the D'Backs (29-39) had a better record...
Honorable Mention (not necessarily in order): Tim Lincecum (Giants), Johnny Cueto (Reds), Johan Santana (Mets), Chad Billingsley (Dodgers), Yovani Gallardo (Brewers), Josh Johnson (Marlins), Javier Vazquez (Braves)