The growing diffusion of wireless technologies is leading to deployment of small-scale and location dependent information services (LDISs). Those new services call for provisioning schemes that are able to operate in a distributed environment and do not require network infrastructure. This paper describes an approach to a service-oriented middleware which enables a mobile device to be aware of the surrounding environment and to transparently exploit every LDIS discovered in the coverage area of the hosting wireless network. the paper introduces seamless nomadic system-aware (SNA) servant. SNA servants run on mobile devices, discover LDISs and are not associated with any specific service. The paper also describes the key features for the SNA servants implementation and for rendering them interoperable and cross-platform on, at least, .NET and JVM frameworks.