The "Red Savina?" Habanero (PVP 9200255) has been tested at over 577,000 Scoville units! That is over 50 times hotter than the common Jalapeņo. The Red Savina Habanero is listed in the "Guiness Book Of World Records" as the world's hottest Chile Pepper.
SOURCE:
http://www.ushotstuff.com/worldshottestchile.htm