So, based on a quick google search, Sony's announced games are:
Launch Day:
-Uncharted: Golden Abyss
-Hot Shots Golf: World Invitational
-Little Deviants
-ModNation Racers: Road Trip
-WipEout 2048
-Escape Plan (PSN Only)
-Hustle Kings (PSN Only)
-Super StarDust Delta (PSN Only)
-Motorstorm RC (PSN Only)
Launch "Window":
-Gravity Rush
-MLB 12 The Show
-Reality Fighters
-Unit 13
Other:
-LittleBigPlanet Vita
-Resistance: Burning Skies
-Warrior's Lair (Ruin)
-Killzone Vita
-Media Molecule's Game (Technically Unannounced)
Presumably, to keep this up, they will need to announce some more games sooner than later.
Sound Shapes, Top Darts, Plants vs Zombies, Dust 514, Jak and Daxter Collection (so I'm told), Malicious, Smart As, Broken (if not cancelled).
That's about all I can think of at the moment, most of their games announced are coming at launch.