Anyone following the upcoming Transformers movie has seen how ingrained GM is in the new movie (taking the place of just about every Autobot we knew and loved in their previous form...come on, Bumblebee is a Camaro?!).
Now, Chevy has put a Transformers game online at www.chevy.com/autobot where you can you can register, pick your Chevrolet (and give it a suitably Transformer-ish name) and challenge others to 5-round battles.
It's fun so far - just tell them Bladeicus sent you. :-)