2. The method according to claim 1 , further comprising receiving from the user a third set of keywords that designate that annotated content annotated by at least one keyword included in the second set of keywords may be shared with the annotating user via selection of a keyword in the second set of keywords.
3. The method according to claim 2 , wherein the step of receiving via a client system the keyword selection for the select keyword includes receiving a request to subscribe to content annotated by the select keyword.