Hi, Paul,
This mailing list hasn't been in use in quite a while, so I'm afraid I haven't seen your message until now. You probably have resolved the issue by now, but let me just say that Ocean development has continued with full force. The framework is being actively developed and used for at least one large-scale project. We are indeed adding support in ocean-dynamo for binary data, and also for native JSON handling. For this, see the ocean-dynamo project on Github.