I spotted a box of sake flavored kitkats at 7-Eleven a few weeks ago and had to buy them. They're probably the weirdest flavor I've ever had (though thankfully not the most unpleasant).
They're coated in white chocolate with sake powder mixed into it. And they really do taste like sake. Surprisingly so. Something about the flavor combination made me think of bananas, but John thought I was crazy.
I wouldn't buy more than one package, but they're definitely worth trying once.