I like Raymonds estimates, even if my own estimates are around two orders of magnitude higher when it comes to brain size (and hence volume of the finished upload grain of salt). I also disagree with the I/O part (the brain has no well-defined I/O systems, since there are feedback from higher levels everywhere and even the primary cortices seem to be involved in processing and memory), but overall I think this kind of well-thought posting is what we should try to write more of on this list.
Anders Sandberg Towards Ascension! asa@nada.kth.se http://www.nada.kth.se/~asa/GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y