A few months ago, I read a post on ProBlogger that highlighted CrazyEgg - a web statistical service. When enabled, CrazyEgg tracks what links readers follow, and generates a heatmap based on those tracking statistics. There is a paid full service and a free trial. I signed up for the latter, and then promptly forgot about it until recently, when I received an email informing me that the trial was over.
The results are basically what you would expect. Links near the top and left sides of the page receive more attention than links elsewhere. One interesting thing that I found was that links to other blogs on the Loose Feathers posts are popular (see image below) and seem to receive more attention than links to news stories.