I see some seriously dangerous peppers listed in this thread .
I am only growing one potent pepper this year, Bhut Jolokia from Baker Creek. I have six seedlings, hopefully that will be enough to make a batch of hot sauce.
Other peppers started:
Hot:
Serrano Tampequino
Aji Limo
Sweet:
Criolla De Cocina
Paradicsom Alaku Sarga Szentes (thickest flesh I have ever seen)
Corno Di Toro