Ok, I was not really believing the hype about this Daiya cheese stuff, but I recently got my hands on some, and I had a quesadilla today. A real, melty, stretchy, delicious quesadilla. It still has that vaugely processed-chemically flavor, kind of like a Kraft single, but it NAILS the texture and mouthfeel. Daiya's about as nutritious as Vegenaise, mind you - no protein to speak of, no vitamins or minerals, but it is really, really, really tasty.
UPDATE: The (not vegan, cheese addicted) 4 year-old likes it, and so does the cat. The cat, in fact, REALLY likes it.