Firemint has been teasing their upcoming line-drawing-centric cheese-stealing stealth game Agent Squeak for quite some time now. The vague release date of "2011" has since transformed into the slightly less vague "summer 2011" and the game has a new name. SPY mouse is going to be Firemint's third "big game", and has been in development for two years
Give the teaser trailer a look:
I've seen the game a few different stages of its development at various conventions, and regardless what they're calling it, I think people will love it. The real question is, will it be the next Flight Control?