While the PSP managed a respectable showing at E3, with surprise titles like Super Stardust Portable and Resistance Retribution coming out of nowhere — it certainly felt like a meager lineup compared to Sony’s other system, the PS3. With the drought of PSP games still going strong, one has to wonder: is that it? PSP’s main main, John Koller, assures PSP fans that there are third-party games in the works — in fact, some will even debut this year. The next wave of PSP announcements will come before next year’s …