About jacking in, a possibility is not jacking into the main mass of the
brain but tapping into the sensory paths.
ie- put wiring in the optical and sensory-motor areas.
One last thing- make the 'jack' a neural feedback loop. It adapts to the
individual 'wiring' of the brain.
So, if you get a 'jack', you need to spend some time 'practising' with
it so that it adapts to your thought patterns and brain morphology.
Make sense?
(In any case, things will be complex even if we had enough technology to do it)
- -Me