This paper describes the architecture and the implementation of Multishelf - a decentralized Peerto-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. Keywords peer-to-peer computing, distributed development, distributed computing, infomediation, extractor, aggregation, peer-to-peer platform, Proem.