17. The method of claim 1 or 13 , wherein associating advertising with the annotations comprises: presenting the annotations to a plurality of advertisers; and having individual advertisers purchase individual annotations.
17. The method of claim 1 or 13 , wherein associating advertising with the annotations comprises: presenting the annotations to a plurality of advertisers; and having individual advertisers purchase individual annotations. 19. The method of claim 17 , wherein the annotations are sent to a 3 rd party advertising service and the a 3 rd party advertising service associates the advertising with the annotations.