Cold fusion is gradually becoming real: see Tommaso Dorigo's posting telling that Rossi's findings seem to be real (thanks to Ulla for the link). The preprint reporting the results of the tests is titled "Indication of anomalous heat energy production in a reactor device" and can be found from arXiv.
The history of cold fusion begins from the findings of Pons and Fleischmann around 1989. Cold fusion has also prehistory: books have been written about cold fusion in living matter before anyone spoke about cold fusion but official science of course has never taken them seriously (see refences in the chapter Nuclear String Hypothesis of "p-Adic length scale hypothesis and dark matter hierarchy").
Now cold fusion is studied behind the scenes but in public physics community refuses to take cold fusion seriously: it is against "the established laws of physics". And of course, the people doing hot fusion do not want to lose the impressive flow of research money to hot fusion research, which has continued decade after decade despite the absence of concrete results. Freeman Dyson has expressed his view about the situation here and here.
It takes especially long time for super stringers accustomed to think that physics has been reduced to Planck length scales to accept that there might be some genuinely new nuclear physics there and that the reductionistic narrative about natural sciences as a march towards super string theory might be a great illusion. The comments of Lubos Motl about Rossi represent a perfect example of the gigantic arrogance of a person who believes that string theorists belong to a new species intellectualy above all other human beings.
As a matter of fact, super string theory shares a lot with hot fusion. It is as unsuccessful as a theory just like hot fusion is a failure as technological project, and its news to the mankind is that the ultimate theory cannot predict nor explain and that we must just accept this message as a truth because the scientists who created it are so brilliant that they cannot be wrong.
Addition: The latest rant of Lubos about cold fusion appeared today. Now Lubos labels Tommaso Dorigo a crackpot, idiot, etc... The message is clear: everyone ready to consider the possibility that reductionism might not be quite correct, is lunatic. As usual, Lubos appeals to authority and attempts to give a label of swindlers to the group, which has performed the tests. This is much more convenient than saying something about contents. Lubos learns nothing: again and again he manages to be wrong but nothing beats him down! Lubos is completely immune to facts.