Carrying boxes and boxes of data to trade shows and other events (and carrying the unused ones back) makes no sense. Although you’d probably bring a few printed items, visitors really want electronic data. I’ve seen many good implementations of touch-screen information systems at shows and in company receptions and training centres, but typically they require quite a lot of programming and configuration work.
Recently I saw the system from InfoAktiv, which simply allows you to drop files in a directory structure, and the system does the rest. It will also record as leads the details of people that request literature to be emailed (and send the emails automatically). It’s a great system, and I’d recommend that you check it out if you have a show or other event coming up.