QUOTE(Evil Agent @ Jun 14 2007, 15:30)

I don't feel like this would be a good thing to add to Stuffed Tracker... JonB is right when he says that a Heatmap like this only tracks where the user clicks, which doesn't necessarily match where the user's attention is drawn into. Imagine you have a page with no links at all on its top-left corner; many tests with eye-tracking systems show that this is the area with the most attention from the user's eyes, but a Heatmap generated through clicks would not show you this at all.
Heatmaps are supposed to be used to optimize your website, but a click-Heatmap requires your website to be somewhat optimized at start already...
I really fail to see where the drawback really is.
Heatmaps are not used to replace experience, logic.
But they certainly help improving usability, even in the case you mention.
Heatmaps are extremely useful in terms of information gathered, they provide a visual aspect that's irreplacable by any charts/tables.
Not to mention that users LOVE heatmaps...isn't it the reason why all major web stats applications have it?
It's been at least 3/4 years maybe more that clicktracks or webtrends have similar features - not counting Google analytics has it, indextools, ....and I believe that these guys work witht he largest websites so there must be a reason...