PaperDesk is an app that allows you to take notes and use your iPad as a whiteboard. Connect your iPad to your projector with a VGA output and share your notes with everyone or present information to a group. You can also record your presentation and then email it, export it, print it, or place in your google docs. The app has a lite version if you want to preview before you buy, but the full version is worth the $2.99.