In front of Min and Bill's Dockside Diner at Echo Lake are a number of crates with various addresses on them. These crates aren't just props to make the dockside diner story seem more legit, rather, they are also homages to famous characters from even more famous films. Imagineers took an opportunity to pay a little tribute to these classic Hollywood films with some of these crates.
This crate is a reference to the film Casablanca.
This crate is a nod to the The Producers (although the name of the sender is funny, if you say the Annita's full name fast enough)
This crate references the film Citizen Kane.