After a criminal lapse in judgement allowed the US RTG manufacture capability to decline, it seems NASA is finally getting back to the stage where they can proposed future space probes with that very basic, reliable and *good* power source:

NASA to Allow Nuclear Power Systems for Next Discovery Mission

Even so, the projections are for a production of only 1.5 kilograms of PU-238 per year by 2022. Even though this is  a great improvement, production of three and a third pounds of this strategically vital material per year seems pretty anemic to me. A better world would see NASA doing its job of exploration and science by launching a few *dozen* long range probes every year.