Sony's first (and second) party are creatures of habit, so I'm going to say Uncharted 2: Among Thieves will come out in November 2009, maybe earlier if they are ready.
Going by Santa Monica's habits, God of War III should be out in March-April 2009, but that's very unlikely. I'm going to predict Q3 2009.
Gran Turismo should release around October 2009.
Heavy Rain should be ready by September
inFamous is semi-confirmed for March, I believe.
I don't think Trico will make it out until December, considering we don't have a trailer, teaser or even a name. All we have is a vague picture with a well and the knowledge that it will involve physical contant.