Interesting article Trevor! However, I wonder what you are defining as life here. There is a biological definition of life and while there may be life forms that are completely different from humans or any other being on earth, they would likely follow the "definition" of life. They would be metabolizing one form of energy to power themselves and would have the ability to reproduce. When you say dark energy can be a form of life, what would it mean? You may be right but I guess we would need to know more about dark energy to answer that.