Given the pace of the development of social networking tools, it's difficult to predict just what will be around in the year 2020. But one thing's for sure, we will still be using social networking tools and, increasingly, they will be merging our professional and private lives. It's likely then that the evidence produced in our virtual lives will increasingly be used in the courtroom. Just what's valid, however, will be a complex challenge - and one that will no doubt test the boundaries of law in the years to come.