The Arcadia Programme at the Cambridge University Library has released M-Libraries: Information Use on the Move.
Here's an excerpt:
Developing m-library services is usually expensive and resource intensive, requiring expertise that existing library staff may not have. Before committing funding and staff time to such projects, it is important to try and ensure, as far as possible, that such investments are targeted at meeting actual needs, and are adding value to existing library services.
The Information Use on the Move project was undertaken in that spirit—to scope the information requirements of academic library users on the move in order to inform future development of library services to mobile devices. The aim was to identify trends in the way people currently interact with information using their mobile phones, and then extrapolate ways that libraries could support those mobile information needs.