It's not a great link I know, but it's breaking news rather than an analysis of the impact of the Twitter campaign. For those outside the UK, this week there's

It's not a great link I know, but it's breaking news rather than an analysis of the impact of the Twitter campaign. For those outside the UK, this week there's been a sustained campaign to get advertisers to pull their ads from the News of the World over a phone hacking scandal (they accessed the voicemail's of a murdered child, and dead soldiers for example).