brainpower
Kurzweil's not to be lightly dismissed...we're finding ways to directly interface electronics to the brain--much of what happens in the brain deals with information retrieve--externalizing that would decrease the load.
The more interesting question is: Why are some brains faster?
As far as increasing capacity goes there are a large number of short and long term approaches.
Long-term, we should be able to jack up the oxygenation rate for blood and provide the brain with energy faster via DNA engineering.
Heat dissipation can be approached the same way--ridges to create more surface area of the skull would work. Short term artificial cooling.
It's probable that we can raise the operating temperature--there are cases of people with normal body temperatures well over 102F. Not a lot, but people with higher body temperatures seldom get sick and thus often are outside the medical system.
Which leads me to wonder if there is an inverse correlation between body temperature and intelligence...
