>Even if you can only store one byte per hundred atoms, this still gives
>you around one million billion megabytes per gram. I wouldn't expect
>that the human brain holds more than a thousand billion megabytes of
>data, and a mere billion megabytes is more likely.
>There's plenty of room at the bottom.
Sure, there's no question that the contents of our present memories may be stored. The question is what happens a billion years down the road, with a billion years worth of memories, at the increased clarity which will most likely be desired, with presumably a billion people (more?) drawing on the same resources. If we discount terminal entropy, and assume that there is a finite amount of matter in the universe, then there logically must be a point where all resources will have been consumed. Is there a way to avoid this? Will the universe experience heat death before then? Does this eliminate the possibility for "true" immortality?