The real-time collaboration of this looks cool. I don't understand what the dinosaur (or now penis) has to do with it. I can't make those colors... where did those come from?

I made something called Sketch-a-bit (for Android) [http://sketchabit.adamsmith.as/] that's a charcoal-like sketching interface that has you start from someone else's drawing instead of a blank canvas. It's been alive for about 3 years and it's interesting to trace back the history of awesome sketches (http://sketchabit.adamsmith.as/master.php) and see how they evolved. Collaborative along the long-term dimension instead of all in parallel.