Posted by randfish Somehow, my flight from Seattle landed just before the newest Icelandic ash cloud began shutting down airports across UK airspace. As a result, I was able to present at SMX London this morning. The presentation is included below. This slide deck focuses on things that are probably in the search engines' ranking algorithm today (e.g. the reasonable surfer model ), might be in today and probably will be more in the future (e.g.