The Mobile Games Interoperability forum recently consolidated into the Open Mobile Alliance (OMA), contributing their technical work to the OMA technical Working Groups: Mobile Games Services. Following are the archived documents from MGIF.
MGIF_Platform_Specification_v1.0
MGIF_Technical_Glossary_v1.0
MGIF_JavaDocs_v1.0
MGIF_Whitepaper_v1.0