"CoSketch is a multi-user online whiteboard designed to give you the ability to quickly visualize and share your ideas as images.
Simple sharing
* Anything you paint will show up for all other users in the room in real time.
* One click to save a sketch as an image for embedding on forums, blogs, etc.
Zero hassle
* Runs in all common browsers without plugins or installation.
* Free and without registration.
Now with Google Maps support!
* Use google maps as the background for your sketches to show directions or share trips."