Great Introduction to Eye Tracking

UXMatters has a very comprehensive introduction to eye tracking this month – “Introduction to Eyetracking: Seeing Through Your Users’ Eyes”: To quote the author:
bq. Eyetracking offers unique benefits and provides a practical alternative to conventional discount usability testing.
This is the first in a series of articles which will use eye tracking to evaluate user interfaces, both on the web and on the desktop. If you’re interested in usability, these will be well worth following, I’m sure.