This social networking site allows you create an interactive poster complete with various forms of multimedia, like embedding a song or a video clip from YouTube.
This web app is the hip new thing. Prezi allows you to present you thoughts in motion enabling you to tell a more compelling story with you presentation. Unlike PowerPoint (which only allows you to move from point A to point B), Prezi's zooming user interface allows you to display and navigate through your presentation media. It's like giving somebody a map to your ideas, not just directions.