I remembered MK starting a topic on healing a couple of years ago:
~Link~For transmission of farseeking, I like the idea of light or magnetic waves (just remember light doesn't have to be visible, it all falls under what we call electromagnetic waves. Your toaster radiating heat to toast your bread, those microwaves exciting the water molecules in your food in the microwave, the radio waves getting picked up by your antennae, the visible light from a multitude of sources, the radiation coming from radioactive objects, all are photons dancing around in different mediums at different energies and frequencies but moving at the speed of light...OK I nerded out a bit there :P).
A couple of interesting technologies that are being developed include being able to read thoughts from the brain and being able to project images from thoughts (been a while since I've read up on these though). The first is scarily close to being reality. 'Scarily' because some of the thought reading stuff is being developed by DARPA backed projects, the defence research group of the US government
~Link~ So perhaps some misfits have developed their brains in such a way that they can read brain waves like this, through some kind of induction. In a similar fashion you should be able to also do the opposite and create specific waves that cause induction in such a way that you control areas of the brain of others (a radio reciever and transmitter both have the same functional parts). This might be full control or just enough to communicate with. This research group here
~Link~ are trying to develop a form of telepathy. So it would be a matter of misfits evolving this way after the great white compared to our reliance on technology to achieve the same things.
Futuretelling is definitely one I can't really put any reasoning behind :P. I like in
Frank Hebert's Dune how Muad'Dib realises that when he is seeing the future that he is at the same time affecting the future by doing so, a problem we have in science where you effectively change the result of an experiment when you observe it (not really an issue until you get right down to the tiniest of things). We don't really have this aspect with Futuretellers but they do caution that these futures may change depending on actions, so I guess they are more like most likely outcomes. Maybe if we view the mindstream as a second universe that reflects our own but how you can move through it and the concept of time in our universe are completely different. In ours we can only go forward. But perhaps the mindstream records the past and at the same time projects what the current future is based on the sum of all the actions and likely outcomes of the current snapshot of our universe. Alternatively, perhaps the mind stream is like a standing wave and has fixed start and end points and the oscillation of that wave is determined by actions within our universe. The great white would have been a huge action on that wave and so there will be very specific nodes on that wave now and most other actions simply cause superficial waves on the wave that the great white generated. And so one of those nodes is where Elspeth meets her fate. The smaller ripples on the bigger wave still have potential to change though before and after that relatively fixed point.