While DIGRA (Digital Games Research Association) is primarily an academic organisation their conference proceedings are made available online after the conference.
This year the conf is in Brunel, outside London during the first week of september this year and it is very interdisciplinary.
The final conference programme is online at http://amd.newport.ac.uk/displayPage.aspx?object_id=11713&type=msw
Myself and Stefano from NUIM will be attending so if you are heading over drop us a line.
Aphra.