Check out Dabbleboard!
By pkasper on Oct 31, 2008
But, have no fear. Dabbleboard is here!
Dabbleboard is a very easy-to-use online whiteboard that can be used by anybody who uses a browser. You can even save a library of your drawings or common objects that you use. And, the most important feature is that it is very easy for multiple people to draw on the same whiteboard.
The best way to see what I'm talking about is to check out the tour.
I plan to use this for a number of reasons, especially when my team at work needs to brainstorm. We are all over the country, so finding tools like this should help a lot.
BTW, Happy Halloween!