When Facebook filed for an initial public offering last week, there were suggestions it could be valued at around $100 billion. Since then, more questions have been raised about the challenges it faces in justifying that value. Olivia Solon, associate editor at Wired magazine and James Ball, data journalist at the Guardian, discuss the prospects.The BBC was thrust into Scottish politics at the weekend, when it was reported that it cancelled an invitation to First Minister Alex Salmond to take part in coverage of the Calcutta Cup rugby match at Murrayfield. The BBC adviser who vetoed the appearance, Ric Bailey, responds to claims he was bowing to political pressure. Broadcaster Lesley Riddoch and former BBC editor Phil Harding discuss why the BBC could face further problems when covering Scottish politics, ahead of a possible referendum on independence.And, as many of the victims of phone hacking settle their claims today, Duncan Lamont of Charles Russell solicitors explains what impact this could have on the several investigations into what went wrong at the News of the World.