By the looks of things, designer Andrey Chirkov is a big fan of Final Fantasy. His concept mouse seems to take its design cues from the FF8 Gunblade—or a hoof (I'm not really sure).
At any rate, whereas the gunblade looks tough and menacing, this mouse looks as though it would snap apart with a single click from a fat finger frantically firing in a FPS. [Project Page via Gizmowatch via Coolest Gadgets via Newlaunches]