Although this information has been reported on in one form or another, here's the condensed list of Sony's first-party titles coming out for PSP and PS3 in the foreseeable future:
Hot Shots Golf: Open Tee 2 (PSP) -- June 3, 2008
Secret Agent Clank (PSP) -- June 17, 2008
wipEout HD (PSN) -- Summer 2008
Elefunk (PSN) -- Summer 2008
PixelJunk Eden (PSN) -- Summer 2008
SIREN: Blood Curse (PSN) -- Summer 2008
SOCOM: US Navy SEALs Confrontation (PS3) -- September 16, 2008
LittleBigPlanet (PS3) -- October 2008
NBA 09 (PS3, PSP, PS2) -- Fall 2008
BUZZ! Quiz TV (PS3) -- Fall 2008
BUZZ! Master Quiz (PSP) -- Fall 2008
MotorStorm Pacific Rift (PS3) -- Fall 2008
Resistance 2 (PS3) -- Fall 2008
Killzone 2 (PS3) -- February 2009
Dates, titles and everything else are subject to change without warning. If it's LittleBigPlanet though, you'll probably hear quite a bit of whining from us first.