Whiteboard Software - Something Similar

Hello All,

Here is a broad question for everyone and I hope something comes up. Currently I am with a company designing an OS X native software that will be used in the private sector.

What I am currently looking for is a whiteboard (like the dry erase kind) but digital. This way I can draw out the flow of say how a small part of the program should work logically, send it over to my database guru who is across the country and he can look at it and visa versa.

Any ideas? Thanks!

That looks interesting but when I tried it out it seems very bloated and installed like 5 different apps. any other ideas?

Bitwise has a whiteboard feature:
http://www.bitwisecommunications.com/chat/