http://www.cnn.com/2009/HEALTH/03/25/miracle.berries.weightloss/index.html
Also:
http://en.wikipedia.org/wiki/Miracle_fruit
(CNN) -- The small fruit has the color of a cranberry, the shape of an almond and tastes like a flavorless gummy.
But after chewing the fruit and rubbing the pulp against the tongue, the berry, known by a promising name -- "miracle fruit" or Synsepalum dulcificum -- releases a sweetening potency that alters the taste buds.
For about 15 to 30 minutes, everything sour is sweet.
Lemons lose their zing and taste like candy. Oranges become sickeningly sweet. Hot sauce that usually burns the tongue tastes like honey barbecue sauce that scorches as it trickles down the throat.
Also:
http://en.wikipedia.org/wiki/Miracle_fruit