16. The web server of claim 15 , wherein the predetermined group is an online group within an online community provided by the online service.
16. The web server of claim 15 , wherein the predetermined group is an online group within an online community provided by the online service. 18. The billboard advertisement creation system of claim 16 , wherein the billboard publication service obtains any blocked contacts from the address book clearinghouse and publishes the billboard advertisement to a user profile store.