The BIGGEST problem remains unaddressed (Score 1)

Yes, this is nice work. Kudos to the researchers. However the biggest problem with building a commercial fusion reactor isn't sustaining the reaction but how to handle all those neutrons. Even if you magically make fusion work, we simply do not know how to capture the heat needed to generate power in any economical way because of the whomping high neutron flux. For the full explanation, see Fusion Power: Will It Ever Come? on page 1380 of the March 10th, 10 2006 issue of Science. Since full article is behind a paywall, I'll quote the concluding paragraph here:

New physics knowledge will emerge from this work. But its appeal to the U.S. Congress and the public has been based largely on its potential as a carbon-sparing technology. Even if a practical means of generating a sustained, net power-producing fusion reaction were found, prospects of excessive plant cost per unit of electric output, requirement for reactor vessel replacement, and need for remote maintenance for ensuring vessel vacuum integrity lie ahead. What executive would invest in a fusion power plant if faced with any one of these obstacles? It's time to sell fusion for physics, not power.

That is, fusion power is still where is was in 1955: "twenty years away."