Secret Agent Clank first look at IGN.

"For a long time, much of the attention for Ratchet and Clank has been placed upon their upcoming PS3 title, Tools of Destruction. However, unbeknownst to just about everyone in the press, a secret title featuring the popular duo was in the works. High Impact Games, the makers of Ratchet and Clank: Size Matters, started a follow-up project to their popular PSP title soon after the game was released. Using the same engine, the developers started working on a brand new title. But instead of focusing on the Lombax, the title would feature the adventures of Clank in his most beloved alter ego, Secret Agent Clank. At Sony's Pre-TGS Press Reception, we managed to get our hands on the debonair little robot."

Full Source: IGN