I'm hearing good stuff about Who Dares Burns hot sauce. I'm still working my way though (the relatively light weight) Encona Cajun Pepper Sauce. I might have to get some Colon Brew though, just to get a good looking shelf in the kitchen ;-)
Check out http://www.gourmetmikes.com/davinhotsauc.html.
The special reserve version of Dave's Insanity Sauce requires you to sign a liability waiver before you can buy it..
who dares burns is most definately a yummy-scrummy-blow-your-head-off sauce... i'd strongly recommend it to anyone... especially new parents wondering what to mix with mashed pear for their newborn's first "real food" :o
actually, i was just kidding... this stuff would probably kill your child!