GazeHawk is awesome. Heat maps like the one above used to cost thousands of dollars to commission. These guys have figured out an inexpensive way to do it using your laptop's webcam. Ingenious. The flip side of it is that they pay people to view websites and provide comments (in addition to your heat map) - about $4 for a good eye track or $2 if not. I've done dozens of these since they've gone live and will continue to do so. Spend a couple of minutes looking at a webpage to get a cup of coffee? Sounds good to me.