;)
A collaboration between researchers in Sweden and Icelands claim to have developed a new nuclear fusion process. It's based on deuterium, and takes place in in small laser-initiated reactors. More importantly they say that they have already got it generating more power than it consumes.
The laser-induced nuclear fusion process in ultra-dense deuterium D(0) gives a heating power at least a factor of 2 larger than the laser power into the apparatus, thus clearly above break-even. This is found with 100-200 mJ laser pulse-energy into the apparatus. No heating is used in the system, to minimize problems with heat transfer and gas transport. This gives sub-optimal conditions, and the number of MeV particles (and thus their energy) created in the fusion process is a factor of 10 below previous more optimized conditions. Several factors lead to lower measured heat than the true value, and the results found are thus lower limits to the real performance. With the optimum source conditions used previously, a gain of 20 is likely also for longer periods.
Inevitably with nuclear fusion, a degree of caution is always advisable. Nevertheless, it's an interesting paper, which can be seen here.