It's clearly a viral marketing ploy. Standard theme: create some type of countdown website (or some other cryptic message) then seed a few high popularity forums by pretending to have stumbled across this thing nobody would ever actually find.
Sorry to burst your bubble but no. I just happened across this by accident. I'm a GIS Developer and was checking out this site. http://onemilliontweetmap.com/ I noticed there were a lot of single tweets floating out in the ocean.
Yeah, I'm looking at you DonnyV.