http://pesn.com/2011/02/14/9501766_Rossi_catalyzer_clarity_interview/
Rossi estimates an energy price of around 1¢ per kW/h using his device. Assuming it is actually shown to work, and work consistently, and that he is right about the cost, it would certainly be competitive with existing technologies.
According to Rossi the first 1MW devices are already under production in the US (by his own Leonardo Corporation, based in Bedford, New Hampshire), while Defkalion Green Technologies, based in Athens, Greece, will manufacture the first devices for the European market. Defkalion is supposed to make some sort of announcement, apparently in March. Rossi has set an October deadline for the delivery of the first device.
Well, I suppose we shall see what we shall see.