What is this Lost Experience ARG thingy?
ARG is an alternate reality game, or ARG, created in connection with a movie, video game, or in this case, a television show. Some popular examples of successful ARGs were the ones for Steven Spielberg's movie A.I. and the videogame Halo 2.
What exactly is The Lost Experience ARG? The writers of the show create this for us as a treat for fans, some Lost goodness for after the season is over. Basically, the game will consist of a network of clues that they have scattered all over in various places. There will be websites made just for this, telephone numbers to call, places to go to (literally), it can be anything. We find all the clues and figure out what they mean, and in the end, we learn more about the story of the show and the show's mythology. The creators want to tell us parts of Lost's story they can't fit into the show. An example would be telling us more about The Hanso Foundation, and other such details of Lost's mythology.
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Starting clue's
First clue was a Hanso Foundation advert listed on 2nd, 3rd and 4th of May in both UK, US and AU where it had a phone number on it.
Try calling it, its a free phone number and gives you the next clue!

UK: 0800 66 66 40, US: 1-877-HANSORG (426-7674), AU: 1800 22 77 17
http://thehansofoundation.org That is the main site, I suggest looking around there also for a while may I add.
For more information on this whole ARG thing, its best to go to
http://www.4815162342.com/forum/viewforum.php?f=12 for guides and such, but discuss on here if you find anything you want to share!
Whooooooooooooooooooooooo!