Robert Worcester: The growth of the internet has slowed dramatically. To reach voters MPs need to go beyond blogging and get back on the campaign trail.
Ad spending online overtook national newspapers' share for the first time in 2006, according to figures from the Internet Advertising Bureau. By Katie Allen.
1.15pm: Yahoo! has established a global network of mobile publishers in a bid to make it easier for companies to run mobile ad campaigns. By Mark Sweney.