As small wearable computing devices become more prolific it seems astute to fully capitalise on their potential to assume responsibility for a range of trivial tasks. The mobile phone which many people now own will undoubtedly evolve from the simple two-way communication purpose it fulfils today, into an integrated communications and organisation companion. We are interested in the integration of such smart devices into an intelligent building framework. Sensors and door activators are useful in their own right but to fully integrate them into a building management system requires the input from many diverse disciplines in engineering and computer science. This paper seeks to explore the technical issues of dealing with a system that manages the information flow through such a building. Specifically it examines the services that make up the core of the building's system.