SEOMoz was given a chance to test a Mirmetrix eye tracking device. The used the opportunity to analyze the impact of Universal results generated by Blended results, the 7-pack, shopping and videos inserted in the SERPS. I was of course most interested in the Local results. Their conclusion?
These results also suggest that the in-page Local/Places results are having a strong impact, even if they fall in the middle of the page. In these limited cases, they seemed to pull attention away from the top organic spots.
Eye Tracking Study by Mike Blumenthal