It's a big day for one of our most celebrated exports. Last night saw the launch of the biggest video game in history, "Grand Theft Auto 4," which is made by Edinburgh-based Rockstar North. It's forecast to make £200m in its first week of release alone. But the series of games have been criticised for glorifying violence. Should we cast these objections aside and celebrate a great Scottish export, or do you have fears that children will get their hands on these games? Graham Stewart (standing in for Gary Robertson) takes your calls, texts and emails.