Comment Re:Heat + Air = Hot Air? (Score 4, Informative) 230
This has already been done and the research is going on now at ITER. This should be one of the last research reactors ever built. It is built to generate 500 MW for 400 seconds. After this reactor its on to large scale deployment.
http://www.iter.org/
http://en.wikipedia.org/wiki/ITER
http://en.wikipedia.org/wiki/Magnetic_confinement_fusion