by kevin marshall: twitter blog
To add art to the wall, send a tweet to @sldraw with a line of xaml. e.g. '@sldraw <Ellipse Fill="Yellow" Height="100" Width="200" StrokeThickness="2" Stroke="Black" />' The wall also supports some shortcuts to maximize your 140 char artwork. e.g. #e instead of Ellipse. Here is a complete list of shortcuts. Canvas is 750x600.