CKENT, you do not know what you are talking about.
There are VERY few jobs for docs with only nucs training. If you have rads training and a nucs fellowship then you can write your own ticket.
I dont know what the future of the field is, but fact is that you are practically worthless to a radiology private practice group with only nucs training. You cant take call, you cant rotate through the various subspecialties, and in almost all cases you will not have enough work to keep you busy 100%. Remember that most nuclear medicine docs work in radiology and private practice probably represents 99% of practice opportunities.
Academics is a different story, but there are still relatively few jobs.