We have recently noticed Google creating a new AdWords PPC ad slot between the three top level positions and the first organic placement (screenshot above).
Google are using this advertising space to promote their own credit card comparison service which could prove to be a worry for some of the big players in this market.
This effectively makes the number one organic link the 11th clickable link down the main section of the search results.
I think this will turn into a prime advertising slot given its position between the main PPC ads and the organic search results, but will Google keep this position for itself of will it start to offer it to advertisers? Only Google knows.