This paper presents a model for the dissemination of information in highly dynamic ad hoc networks, such as those composed of mobile communicating devices. This model relies on an asynchronous, peer-to-peer propagation scheme. This approach is expected to help do with station volatility, as it allows communication between devices that are never --or only rarely-- active simultaneously in the network. It is also expected to help transport information in a fragmented network, as a station roaming between network islands can provide its neighbors with information it has gathered previously while visiting another part of the network.