Much has been made for the potential for blockchain technologies to improve the security, scalability, and economics of distributed data delivery. The CacheCash experiment proposes to understand the real-world feasibility of such technologies by deploying a cutting edge blockchain-based content distribution network (CDN) to distribute open source software to real world users. In this way, we will be able to evaluate the strengths of such approaches, the weaknesses, and to identify research challenges that must be tackled to allow these technologies to become widespread.