This was just reported on MSNBC-TV and here's an article about it -
"...the premium Swiss chocolate company Callebaut claims to have solved both of these chocolate conundrums with the invention of a brand new confection known as the Vulcano.
What’s so special about the product? According to founder Barry Callebaut, the new bar is completely melt-resistant to hot weather: it’s able to withstand temperatures up to 131 degrees Fahrenheit without getting sloppy. Even better, the new chocolate, which will be available in both bar and cookie form, will contain up to 90 percent less calories than a typical piece of chocolate.
It sounds revolutionary, but the question, of course, is the taste. Is there any possibility that a Vulcano chocolate could compare to the luscious flavor of your favorite Lindt bar? Callebaut claims that it can—and, if the company’s right, they may have struck (black) gold.
“It’s nice and chocolatey, with a strong aroma, and crispy rather than creamy,” a Callebaut spokesperson, Gaby Tschofen, told The Guardian. “It does melt in the mouth, but it is the enzymes in saliva rather than the heat of the tongue that causes it to dissolve.”
Sadly, the Vulcano bar is still in testing stages, but it should be appearing on grocery store shelves in about two years."
http://gimundo.com/news/article/new-non-melting-chocolate-bars-are-90-percent-lower-calorie-than-normal/