Mobile ad hoc networks have been recently receiving much attention due to the important prospects they offer in application terms. Indeed, beyond the application services envisioned so far in emergency and military scenarios, civilian mobile ad hoc services usable in everyday life are considered from now. Service provision is a critical issue to he success of this new computing paradigm. In this paper, we present a novel approach for the service provision in intermittently connected mobile ad hoc networks, as well as a middleware platform implementing this approach. This approach relies on an asynchronous communication paradigm supporting a content and context based management of messages used in the service provision.