It's called the Ghost Chile or Bhut Jolokia and it's known as the world's hottest pepper. I've grown it, tasted it and loved it. But it's not something to be toyed with.
It's so hot that according to The Associated Press, this pepper is being developed as a weapon by the military in India. The pepper is in the Guinness World Records as the spiciest chili pepper and the government plans on making tear gas grenades using parts of the pepper.
Here's a quote from the story:
"This is definitely going to be an effective nontoxic weapon because its pungent smell can choke terrorists and force them out of their hide-outs," R.B. Srivastava, the director of the Life Sciences Department at the New Delhi headquarters of the DRDO, said.
You can order the seeds here and have lots of fun with friends and family with this pepper. I discovered the pepper when a reader was looking for a place to order the seeds. After I hooked him up with The Chile Pepper Institute, he sent me a box of the fruit.
There are lots of great YouTube videos of people trying to eat the pepper, but I like this one. It will let you know what you're in for. The taste is incredible, but be careful.