ExperienceCurve by Karl Long

The Poynter institutes Eyetrack III - Homepage makes for some interesting reading. Basically they have tracked and mapped the eye movements of people viewing particular web pages, giving some valuable information about how people interact with various designs.

In some ways it’s rather like Paco Underhill’s ethnographic techniques of following people through shops and documenting how they act. If you haven’t read it I highly recommend you take a look at his book “why we buy”