is letting you doodle within its
browser with a simple app.
You can go to Canvas using canvas.apps.chrome and start drawing immediately, as previously reported by Chrome Unboxed.
It's pretty straightforward -- you can choose among pencil, ink pen, marker, chalk and eraser, then pick any hex color. This gives you a massive range of palettes.
Your drawing is saved to your Google account, and you can download it as a PNG file.
Drawing with a mouse or touchpad isn't ideal (as evidenced by our quick attempt), so would-be Google Canvas artists probably will be better off using a stylus and touchscreen.