Microsoft Netmeeting allows you to share a whiteboard... Comes included with Windows XP, although it no longer has a shortcut icon associated with it.
Launch: start -> Run -> conf.exe
One catch: while it's running, DirectX may not work properly, so keep that in mind if you're also working on game programming stuff.
Launch: start -> Run -> conf.exe
One catch: while it's running, DirectX may not work properly, so keep that in mind if you're also working on game programming stuff.