Scriblink is a free digital whiteboard that users can share online in real-time. Sorta like pen and paper, minus the dead trees, plastic, and the inconvenience of being at the same place at the same time.
Mash your ideas and media together with friends in a dynamic whiteboard wiki. Using photos, videos, and other web content you can instantly create brainstorms, presentations, scrapbooks, and enjoy an interactive chat with more than 50 friends.