Just had to post this because it's so cool looking and conceptually useful to refer to. A recent
EyeTracking study has produced this interesting bit of visualization for your edification and amusement: "How people look at Google search results"
(click image for full-size)
Not surprising perhaps, but intriguing nevertheless. It'd be really interesting to see this study performed with different page layouts and contexts. There's some info on the study at the page linked to, but you have to write them to get more info. Maybe I'll ever even do that.