This will open My Org-mode Agendas with only things tagged @OUT:
(fset 'open-agenda-out
(kmacro-lambda-form [? ? ?o ?r ?g ?- ?a ?g ?e ?n ?d ?a return ?M ?@ ?O ?U ?T return] 0 "%d"))
(fset 'open-agenda-home
(kmacro-lambda-form [? ? ?o ?r ?g ?- ?a ?g ?e ?n ?d ?a return ?M ?@ ?H ?O ?M ?E return] 0 "%d"))