If you want to index items that were added the the bboards before you set up search, you need to manually insert them into the queue.
Write a pl/pgsql function to do search_observer__enqueue(object_id, 'INSERT') for every bboard object you want indexed.
Here is an example I wrote for forums:
create function enqueue_forums() returns int as
'
declare v_message_row record;
begin
for v_message_row in
select message_id from forums_messages
where forum_id in
(select forum_id from forums_forums
where enabled_p=''t'')
loop
perform search_observer__enqueue(v_message_row.message_id,''INSERT'');
end loop;
return 0;
end;' language 'plpgsql';
