The Papershow package consists of a dongle (like a USB stick), pen and pad. Papershow saves all work on the 256MB USB, so you can borrow someone’s computer and not worry about leaving any files behind. and 200 pages of printer paper for $19.99. If you don’t have a  Tablet PC to write directly on your slides during a BBP presentation, you can always use a whiteboard as a companion to your screen.  But if you want even more flexibility to write from other places in the room, or to let your audience write on the screen, try Papershow , a more portable solution