Bluejacking is not dead. I read this post by Russel and I've downloaded Mobiluck for my Nokia 7610. After using it for a couple of weeks I can say that although it doesn't work well all the time, you can definitely see the potential.
As Bluejacking gets ever more popular, watch out for the kids using it as free local messaging mechanism, especially as Bluetooth increases its range from the current paltry 10 metres. When a range of 100m + is offered, it's going to be a serious messaging platform for communities like schools, malls and many workplaces.