The Lost Experience
-- web sites
-- telephone messages
-- billboards
-- TV
Hmmm... does this concept seem familiar to us? They are leveraging the world that they've created to develop new experiences. This will be interesting to check out! And it's not essentially a marketing tool (though of course, to some effect it is), in that the show creator's are behind it (and not the ABC promotion dept.)
New York Times article
E-Online article