Having seen the rate at which other energy sources are...

Having seen the rate at which other energy sources are progressing (e.g. a new storage battery technology every other week...), I can't see much of a future for coal beyond about 5 years. Given their rate of progress to date, the whole Exergen thing is likely to remain an interesting idea that never got off the ground (or into the ground come to that....lol)

It would do MNM the world of good to ditch the BC once and for all (it has become little more than an excuse...), set out firm timelines for their gold projects, then get on and actually deliver on a project.

The first time MNM actually achieve this (if they ever do), then I expect you'll see a massive re-rate in the SP. Whether IK is still there to see it is another thing altogether.