Looking at my Skype client running today, I see there are nearly 9 million people logged on as I write this. Some would say that's enough to show Skype has reached critical mass. But for me the real sign that Skype will soon take over the world is this. My mum uses Skype. I don't mean it's installed on her computer and she ignores it. No, she actually called me up on it the other day. And today she started an instant messaging session with me. So congratulations to Skype for writing a piece of software that is simple enough for a pensioner with techno-fear to use. And congratulations on your impending world domination.