A few of the excelent PS3 exclusives that come to mind:
Killzone 2 & 3
Resistance 1 & 2
Uncharted 1 & 2
Little Big Planet (actually a really cool game)
...and the best of them all...
GOD OF WAR!!!
Edit: I am "KenyanSandBoa" on PSN as well...feel free to shoot me a friend request.