Track Every Click with Crazy Egg's "Confetti"
Confetti overlays your site, showing each visitor’s click as a colored dot. The colors stand for the categories you sort the clicks by: operating system, browser, window size, time before clicking, and what search term brought them to the page. It even shows you clicks that weren’t on links, so you know if your users are expecting a link where there isn’t one. You can see the results in aggregate as a bar chart or click on individual dots to find out more information about a particular user. For instance, you can use Confetti to see how users from different referrals behave, and settle the debate over exactly how many of those Digg users click on your ads.
There are a couple other optimization services out there: Map Surface, ClickTale, and Click Density. Click Density was one of the first services to show each unique click on your site, but Crazy Egg has added a simpler point-and-click interface for drilling into your data.
Crazy Egg is based in Orange County California and has reportedly been in acquisition talks.