Just to pick up on another point in the recent post by the Inside Adwords blog. There has been frequent discussions on whether the landing page quality is taken into account for ad ranking.

Google has cleared this up by stating the landing page quality only directly effects your minimum bid, not your ad postion.

Will my landing page quality affect my ad’s position?

Not for Google search. While one’s landing page quality is directly correlated with the minimum bid required for one’s ads to run, it does not affect your ads position (or ‘rank’, as it is often referred to) at all. However, since there is no minimum bid requirement for contextually-targeted ads, low quality landing pages will result in the need to bid higher to compete in the auction, which could also impact your position on pages in the network.