Video is in MP4 format:
http://irsmurf.com/forums/thiscomponent.mp4

First, I apologize for the horrible video quality. This is a video I took just minutes ago. A big... wheel on my engine is wobbling and making a not-very-loud scratching sound. It is wobbling worse than it looks in the video.

Yes, I know *nothing* about engines.

What is it and what can I do about it?

My Crossfire is under warranty with CarMax, so I'm going to call them tomorrow morning. I am terrified because I lost the receipt for one of my oil changes last year... I'd hate to lose my warranty on that technicality. I wish I used credit cards for everything, now. >.<