Misc: every square inch of the human body has an average of 32 million?

Questions

Sci Fi: Charles Platt novel where human personalities are stored in computers?

Sci Fi: FTL is an acronomy for ______ ____ _____?

Sci Fi: In Lord Valentine's Castle, Sleet's hair turned white during one of these?

Sci Fi: Name the child who became a magician's apprentice in Feist's Magician?

Sci Fi: The aliens in Mission Earth used one of these to power cities?