Not sure if this is the right forum or if it has been posted before, feel free to punish me if so. Anyway, long before the days of garageband I used to see bands on stage, usually the dance type ones with a Powerbook stacked on top of their keyboards. I'd like to know what they used them for, i.e what software package allowed them to play their music and samples live on stage. Or are they just there for show? I only thought of it when I saw Duran Duran with one at the Brits but I've seen them out and about for a good while. Cheers.