We have whiteboards at work that can print their contents directly, which can be handy. It got me thinking, however, about whether you could go the other way and have an image print onto a whiteboard with dry-erase ink. If you can scan the images to a digital file, then the two put together make a whiteboard with a memory that can be recalled at any later date. You could keep one diagram on the board for weekly meetings and still allow the board to be used for the rest of the week.
Mokalus of Borg
PS - It's not that big a leap of tech logic.
PPS - I've just never seen a whiteboard you can print to.