Two new query options (AwaitData and Exhaust) and all new response flags (CursorNotFound, QueryFailure, and AwaitCapable) have been added to the Mongo wire protocol (http://www.mongodb.org/display/DOCS/Mongo+Wire+Protocol). The driver should handle the response flags appropriately (eg. CursorNotFound should throw exception rather than silently end the query results). The driver may implement the new query options if desired.