londrum - 8:35 pm on Aug 22, 2009 (gmt 0)

speaking as a publisher, that doesn't sound too great. it's not much different to a pop-up, but on a smaller scale. people turn off banner ads because of all the intrusive flashing images and changing text, and having boxes pop up all over your page when the user is just trying to get to the navigation, for example, or read the article, is just annoying for them.

plus google has to keep the publishers happy. at some point the click-through rate will drop so low that publishers will start dumping the ads for something more profitable.