Very good read. This sparked a few ideas about the using faces and where they are looking.
I would be willing to bet that 90% of the people complaining about not making money will skip this article to their detriment.
Heatmaps are definitely worthwhile, you just can't predict what a user will do. I was trialing a few pages with clicktale this past month which could replay back what a user was doing on the site, it's just like your standing behind them watching and it's interesting to see how people wander around. The free version will only playback a limited # of sessions captured each day and also only show two pages during the surfing experience but you could see the value of this if you had an ecom site.