Dabbleboard saves your sketches, time - CNET
Summary
It lets you put together a map of ideas very quickly, and supports both free-hand drawing, along with a system that will automatically convert basic doodles into sold shapes like circles, triangles, and squares. The one caveat here is that only one person can be actively making changes for it to save, otherwise anything youre working on can be overwritten by someone who jumps in and draws something. The system is smart enough to alert you when the other person is using it, however, I found it to do a poor job at respecting the precedence of an edit that had begun before someone elses. Any work youve done can be shared in a central library with items that can be copied back to your personal collection for editing and redistribution. You can also embed any of these works on a blog or site with code, which means when someone makes a change it will go live wherever its been embedded.