Nick, the issue you would face with any kind of video feedback used for real time control is the amount of lag between the robot's motion and what you see. Depending on the system you use you could get something with no noticeable lag, but as most budget systems are going to have some kind of lag you might have issues. Just for reference, the '09 Robot (The Shumper!) was geared to have a top speed of about 12.5fps. If you were going full speed and had a lag of 1/10th of a second the robot would be 1.25 feet from where the video says it is... Now that problem wouldn't be such and issue on a slower robot.
Also, I know you and I spoke about the LED's in Safety Glasses for feedback before. I'd love to see you get that going
Message or Call me sometime, Just because I graduated doesn't mean I'm not around. Lol.