It's ok if you didn't know, we Googled it too!
Moving on, Sebastien Rubens, a former SCEE employee, has spoken out about the PSP's SDK. Speaking with Edge-Online, he asked Sony to give more support to developers. He claimed that Apple's own iPhone SDK is flat-out "better" and that SCEE is "slow to move" during the submission process.
Rubens currently works for Anozor, who made the marginally ok No Gravity: Plague Of The Mind.