This is Logitech's Cube Mouse. It's tiny, as you can see in these photos.
This is one tiny mouse
Logitech's Cube is a tiny device that does double duty as both a mouse and presentation remote.
Logitech's Cube mouse is tiny, and you'll find it in January for $69.99
Logitech has announced a crazy little mouse with a square design and a touch panel on top. It converts into presenter mode automatically when lifted off your desk.