We describe the architecture and the implementation of Multishelf-a decentralized peer-to-peer infomediator. Multishelf was designed and built during a ten-week senior software methodology course using the Proem peer-to-peer platform. We discuss the infomediation problem, present our scalable peer-to-peer solution including the effectiveness of using the Proem peer-to-peer platform, and conclude with plans for future work.@en