From the announcement:
Organizers are currently seeking proposals for the 2015 DLF Forum program. The Program Planning Committee requests proposals within the broad framework of digital collections, infrastructure, resources, and organizational priorities. You do not need to be part of a member organization in order to submit a proposal.
The Forum traditionally has no overarching theme so that we can craft a program that speaks to current issues of interest to our community. We depend on contributors to focus proposals on action-oriented topics targeted towards a practitioner audience, considering the aspects of design, management, implementation, assessment, and collaboration.