This is a great talk by Simon Baron Cohen. He describes how three personality disorders (borderline, narcissistic and anti-social) are fundamentally tied to an inability to empathize with others. Although he does not mention them by name, mirror neurons are thought to play and important role.
I had the opportunity to visit Stowe Vermont for a recent conference. We had our afternoons free and took mountain bikes along Rock Brook and hiked to The Pinnacle (both popular local attractions). I was able to take several HDR photos of the flowing water. We also saw several interesting plants along the way, including Indian Pipe (Monotropa uniflora) a flowering plant that has no chlorophyll and lives more like a mushroom. It is related to blueberries oddly enough!