This is GHOP task #10: http://code.google.com/p/google-highly-open-participation-drupal/issues/...
"Click Heat maps" can be used on web sites to show what parts of a page are
frequently used. The Drupal community can use this data, particularly on
the administration area, in order to help improve the visibility of
frequently used links.
This task involves researching about click heat map tracking, what open
source/free heatmap tools are out there, and how they can be wired up to
work with Drupal.
The deliverable on this task is a report of at least three (3) open source
heat map tools, a list of at least five (5) pros and cons of each, and,
based on that, a recommendation for which one Drupal should use. It should
accompany a post to Drupal's Usability group about how they can setup a
test server to track heat mapping over the course of a few weeks in order
to gather data.