The way I understand this article... (Score 1)

Its basically saying that the universe is so inconceivably big that there is a very high probability that an infinite number of equivalent "earths" exist which, initially only considering my life, means that there is an equally high probability that my life is being led out in an identical way, with each one of us making different decisions at different stages.

I would say that this is equivalent to the problem of making every bitmap file possible... I think it went, if you set some criteria, such as an image of size 1024*768, 32b colours, and set out to create every possible combination, while you would end up with a lot of junk, you would theoretically create every image possible, you would have a snapshot of every moment in history, a picture of every possible human face etc... The theory discussed sounds the same therefore saying that there is so much space out there that there is a high probability that every possible configuration of not only my life but everyones life also exists. So it is not really saying that these exist on another plane of existence, along the lines of a 5th (and beyond) dimension but exist in the same dimension as we do, just a long way away.

At least thats how I read it :)