From the look of things it would appear that Google are in the midst of a pagerank update, a time when all knowledgeable webmasters cross their fingers and hope that their sites get a boost from the changes [and definitely do not suffer a relegation to a lower value]. There are webtools out there which allow you to view the pagerank of any website at the various Google Datacentres - normally the values would be the same across them all but at present there is a definite difference showing which datacentres have updated and which have not. How does this affect Promoting London? Well, as the word cloud page makes clear, once it reaches a certain pagerank then the cost of hyperlinks from it will increase. This will happen when all the datacentres have been updated which could be tomorrow or could still be a couple of weeks away [there never seems to be a set time span over which these updates take place]. All that I am saying is that there may be a price increase and it may be very, very soon.