We were discussing machinima in class today, and some people seemed unaware of what it was. Julian provided a link to the machinima website, and I'd like to supplement his post with some specific video examples of one of the most famous machinima series, Red vs. Blue, created by the guys at Rooster Teeth.
The first episode ever. Of all time.
An awesome action sequence integrating both machinima and 3D CG animation.