Few to many Whiteboard (FMS)

Is it reasonable to expect that with flash media server and actionscirpt 2.0/3.0 you could build a whiteboard that has a few to many type style, in fact, one to many, that could withstand traffic of a thousand or so spectators? In other words, is it possible to make a whiteboard one person edits, while a thousand people view? If so, do you have advise on the best methods and hosting to do so? Thank you.