Consider using a iPad at your next trade show.
The iPad is mobile and can be connected to the Internet. It can be used to show your online product presentations (SlideShare), product videos (YouTube), sample photos (Flickr) and hyperlinks/ attachments can be e-mailed to the attendee on the spot.
Raffling off the Apple iPad during the show and announcing the winners on Twitter using #showname will also help draw more attendees into your booth.
