Its at the edge of legit science. Every so often some government lab will toss some money at it and come up with maybe some anomolies but nothing breakthrough.
Hot fusion is 2050-ish and is a major step forward. In my opinion the "hydrogen" economy really is the hot fusion economy. Until then hydrogen cracked from water with electric power is just a battery competing with other energy storage systems to do hybrids or plug-ins. (Which is still a much better world then 20 mpg gasoline engines).
My guess is several hundred small companies have made exaggerated claims about their experiments in cold fusion in an effort to get loans, grants and investors. Apparently no one has a one meter cube you can buy that produces as much power as a tiny power cube that you use to run a portable phone. It is possible that a real cold fusion device will be marketed soon. There is a niche market for a unit that produces a small amount of electricity at a reasonable cost for many years with no maintenance. Neil