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The Intercloud represents the next logical step in the evolution of cloud computing overcoming issues of data/vendor lock-in and dealing with volatile service requests. However, resource discovery across heterogeneous Cloud Service Providers (CSPs) remains a challenge. In this paper we present a P2P-based distributed resource discovery mechanism based on spatial-awareness of cloud data-centers belonging to different Cloud Service Providers. The scheme is based upon exploiting location information of Data Centers and organizing them into DHT peers for optimal communication. It thus allows for QoS-compliant resource/service provisioning across Cloud Service Providers (CSPs). Simulation results establish the effectiveness of the proposed scheme.