CanadaPhilApril 25, 2012I saw several live TV interviews on this topic yesterday evening... Wow! This thing is really already in progress and very do-able!
And just to clarify.. CAMERON is really just a bit player in this.. There are many, many high-rollers invoved here.
And this is not one of those "it wont happen in our lifetime pipedreams" but they aree very confident that the initial phases of this thing will be well underway within the NEXT 10 YEARS !!! 
Know, my excitement over this whole thing has now been tempered with the thought that petty & possesive governments will really NEVER let this happen... simply because, they do not want to be eclipsed by PRIVATE for PROFIT corporations run by investors seeking returns.
And if for no other reason, something like this will make tax payer run SPACE PROGRAMS seem like nothing more than bloated "pork projects". When NASA is now having to rely on private companies having to come up with working plans to actually get things done in deep space, it is basically an indictment against the organization and the "International Space Station".
I would not be the least bit surprised to see some form of UN style BS "resolution" passed by familiar players essentially declaring that any PRIVATE interstellar activities will be declared as ILLEGAL, or new governmental  bureaucracies will be quickly created for no other pupose than to completely reign these kinds of forward thinking ideas in and crush them in their tracks.