This book constitutes the refereed proceedigs of the International Workshop on Innovative Internet Computing Systems, IICS 2001, held in Ilmenau, Germany, in June 2001. The nine revised full papers and five short papers presented together with two invited papers were carefully reviewed and selected from 30 submissions. Among the topics addressed are multicast protocols, IP-QoS, distributed environments, Jinni agents, Internet services, Web algorithms, agent-based collaboration, agent-based distributed computing, Internet trading services, mobile networking, and distributed teams.