Hi Interested in your views on this and any references to research on the subject Using Google Books recently I have discovered multiple citations of a web site I produced years ago in a whole load of publication. Really quite touching to find these 10 years afterwards I imagine that this must have a positive effect on search engine listings for this site. The site has really good listings still. Has any research or any announcement been made by Google about this. Pushing this a bit further ; An advertising hoarding has a web site address http:// ... would Google StreetView pick this up and could it be used as a signal too ? Neil PS No I don't sell adversing hoardings 😉