How about a dead simple document sharing website that lets people read the same doc, on multiple computers, at the same time? (i.e. if you have a bunch of peopl

How about a dead simple document sharing website that lets people read the same doc, on multiple computers, at the same time? (i.e. if you have a bunch of people on a call with computers up, the speaker can send around a reading link that lets him or her flip pages for everyone viewing.) I find myself wishing for this functionality pretty regularly lately. Broadcasting the pointer, real time comments & annotations seem cool too.