Zwibbler - Drawing on HTML5

Need a site where you can draw at will without any Flash plugin requirements? Check out this Zwibbler which uses nothing but HTML5 and Javascript.

Only the text rendering is done server side, but everything else is done in your browser using javascript. You can find more about it here, including how the mouse management was done using the concept of abstracted Mouse Behaviours.

Defintely worth a read and trying it out.