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Doodleboard is a new collaborative drawing site designed for small teams or - more likely - people like me who just mess around with it. It provides a huge canvas on which you can add shapes, lines, text and upload images. You can also chat live and track the updates from other users. I love the idea in principle, although it seems a little slow, and I occasionally receive errors when editing text.
It's much easier, however, to get to grips with Doodleboard by viewing the screencast (below). My take: great idea, execution needs work. I've also seen embedded Doodleboards: these could have more potential than the application itself.