On the heels of the thread about the Polyscience/Breville ControlFreak, it appears all-metal induction hobs have now arrived in USA.   The Panasonic KY-MK3500 is a 208/220v single phase hotplate that should operate on any home circuit that is wired for coil or radiant ranges.  It is rated to 3500 Watts at the "old" 24kHz frequency (ferromagnetic pans), and 2500 Watts at the 90kHz frequency chosen for aluminum and copper, and switches automatically between the two.  Panasonic claims its