a very very delicious vegan, dairy- and soy-free nacho cheese called NACHEEZ! lovingly made by a sacramento-based company, Love & Joy. the recipes are based on roasted bell peppers and have a real nice veggie flavor. the spicy one is a hit with tortilla chips, and the regular is great for acne-safe mac and cheese! you can get it at rainbow grocery for about $6/jar in the unrefrigerated salsa section in the chip aisle.
there's also a vegan nacho cheese by a super cute, hip austin, tx based couple that is nutritional yeast based, about $5/jar. it also lives in the non-refrigerated salsa section in the chip aisle at rainbow grocery. it's delicious too, though when tasted side by side with nacheez, general consensus preferred the NACHEEEEEEZEY FASHEEZY.