Dave Kehr's blog (where you'll find some of the best discussions about film on the web) is sub-titled "reports from the lost continent of cinephilia." As far as I'm concerned, the Holy Grail of the lost continent of cinephilia is the vanished footage from Orson Welles' "The Magnificent Ambersons." (You know the legend: The studio re-shot and re-cut the film to make the ending more, uh, "upbeat" while Welles was off in Rio shooting Carnival footage for "It's All True." The discarded portions of Welles' "Ambersons" were lost -- possibly dumped into the ocean.) Well...
At MUBI, Doug Dibbern has composed a magnificent meditations called "Cinephilia, the Science of Hope, and the Sacred Ground beneath the Grapeland Heights Police Substation in Miami, Florida" in which he fantasizes about obscure objects of desire -- movies seen and unseen (and perhaps unseeable) -- including the lost "Ambersons."
Dibbern begins with Dario Argento fantasies and works his way to Ambersons and a police station in Florida: