A report from the UK’s Internet Advertising Bureau, compiled with the help of the World Advertising Research Council and PricewaterhouseCoopers, forecasts that internet advertising revenues will overtake tv ad income sometime in 2009.

OK, it’s going to be a slightly biased report talking up the net ad industry. But even if it is slightly close to the truth it is an astonishing milestone. The revenue shift is going to come from so much tv output appearing through the web, with back catalogue material appearing in archive form that is easily searchable, coupled with increasing broadband speeds.