Purpose: Define what an "Oustervote" is.
[Someone want to summarize what John Ousterhout meant by this term?]
Having seen and participated in enough oustervotes to start using the term myself, I think I can take a stab.
It just means "unscientific audience poll". Defining hallmarks of an 'oustervote' are:
(It's also often shamelessly rigged - John would make a running gag of overlooking raised hands, and so on. Of course, this was often when his mind was already made up on an issue where broad consensus was unlikely, rather than when he was actually trying to get information from the audience.)