Looks like Google is testing 3 ads on the top-left of the page (premium spots), and 3 ads on the bottom of the page, below the search results. Similar to Yahoo, but without ads on the right column. I opened my Firefox browser and saw the regular ad format with ads on the top-left and right column. But in Internet Explorer, I'm seeing 3 ads on top, and 3 ads on the bottom. This occurs whether preferences are set to 10 results or 100 results per page. The layout doesn't look that great, and I have a feeling it won't exactly help advertisers as well.