NetCanvas
This Proof-of-Concept program was written after some talking with people disappointed with current solutions to online collaborative art. While I do not believe this simple proof-of-concept program to be the end all solution by any means. It is just that, a proof-of-concept. Turned out to be a bit harder then I thought.
In short, it allows you to draw on the same canvas as someone else on a different computer. While at the same time chat with them in the chat box below. This proof-of-concept is limited in what kind of drawing, only supports up to 250 people and only has an 1200×800 sized canvas. Though in theory any number of either is possible, as well as more complicated features such as zoom/rotation and such.