A question I'm not sure how to phrase to Google, and which has so far made Facebook friends think too hard and go back to doing work at work: what is the maximum output bandwidth of a human, in bits/sec? That is, from your mind to the outside world. Sound, movement, blushing, EKG. As long as it's deliberate. What's the most an arbitrarily fast mind running in a human body could achieve?
(gwern pointed me at the Whole Brain Emulation Roadmap; the question of extracting data from an intact brain is covered in Appendix E, but without numbers and mostly with hypothetical technology.)
Don't you have to define the receiver as well as the transmitter, to have any idea about the channel bandwidth? I mean, if the "outside world" is the Dark Lords of the Matrix, the theoretical maximum output bandwidth is the processing speed of the mind.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.