Yahoo! Search, which currently has the most paid ads above the natural results with 4 ads, has decided to put some emphasis back to the natural by adding an arrow next to the first natural result.
Its pretty easy to see and does have impact (more so once its full size (my preview is a bit small) when there are ads for terms.
On the opposite end is MSN which seems to place the least emphasis on PPC ads, yet somehow has the highest amount of clickthroughs in relationship to natural clicks according to Enquiro & Marketing Sherpa, see our Search Visibility post.
According to this data, natural results on all engine account for more clickthroughs, so “naturally” this is a good move for Yahoo!