Hiro pauses long enough to get this down, then keeps walking. He mumbles "Bigboard" again, recalls the magic map, pinpoints his own location, and then reads off the name of this nearby screenwriter. Later on, he can do a search of industry publications to find out what script this guy is working on, hence the name of this mystery director with a fetish for bazookas. Since this whole conversation has come to him via his computer, he's just taken an audio tape of the whole thing. Later, he can process it to disguise the voices, then upload it to the Library, cross-referenced under the director's name. A hundred struggling screenwriters will call this conversation up, listen to it over and over until they've got it memorized, paying Hiro for the privilege, and within a few weeks, bazooka scripts will flood the director's office. Whoom!