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A mobile ad hoc network (MANET) is a collection of mobile wireless nodes that can dynamically form a network without any pre-existing infrastructure. Due to the distributed nature of MANET, its networked applications typically employ the peer-to-peer (P2P) paradigm. Multiple P2P networks, corresponding to different applications, may coexist on a large ad hoc network structure (eg, battlefield, urban vehicular grid, etc). MANETs may be standalone, or may grow as an "opportunistic" extension of the wired Internet. In contrast with the wired Internet counterparts, P2P applications for MANETs are still in its infancy. Beyond popular P2P systems like KaZaA, one of the most promising recent developments for the Internet is a set of proposals for P2P look-up services based on Dynamic Hash Tables. In this invited workshop, we would like to focus on the applicability of the wired P2P models to the wireless scenarios and more generally to the challenging research problems emerging in the ad hoc P2P area. Particular topics of this workshop include, but are not limited to: * Quantitative characterization of mobile P2P application scenarios (e.g., emergency, infotainment, military, ...) * Design challenges of purely mobile P2P applications (e.g., mobile file sharing, mobile instant messaging, mobile gaming, ...) * Design challenges for ad hoc networked extensions of wired P2P systems (e.g., Gnutella, KaZaA, dynamic hash tables, multi-player-gaming, ...)