I used Lulu's Superhot green chiles - which is an xx-hot green chile just a notch less hot than Dynamites. I much prefer them to Dynamites because they have nearly as much heat but much more green chile flavor. This aioli is definitely hot. Lulu's Superhots are only available at Lulu's Farm in Brighton & The Chili Guys on 55th & Federal (303) 455-4030.
You can get similar flavor and heat level by using mild or hot green chiles and adding fresh jalapenos, preferably roasted but raw will work. If you want it still hotter, use serranos.
I like to adjust the heat to taste by only adding some of the hot chiles, tasting, and adding more if I want.