According to the informercial you need an induction type of cookware. Yet I've been reading some of the reviews elsewhere online and they say this, Cast Iron, Enamel Cast Iron and some Stainless Steel. Here's a link to a blog that'll help you out more.. http://cookingequipment.about.com/od/cookware/f/Induction-Compatible-Cookware.htm
http://theinductionsite.com is a great site of researched information to educate ourserlves about this method of cooking and all the details.
YES! take a magnet to your pans and see if they are magnetic.
Perhaps on Amazon.com, they could let folks know in each cookware listing, which methods of cooking can be used with that particular cookware. I found this type of information on the website, potsandpans.com. In each description there is an explantion of which cooking methods can be used with the items.
if it's indution ready it will work. most of the new stainless are induction ready while older ones aren't like mine. I needed to invest in new Emeril pro clad stainless cookware which is induction ready