hedwig Avro binding?

[Yang]

now the client api

void    publish(com.google.protobuf.ByteString topic,
org.apache.hedwig.protocol.PubSubProtocol.Message msg)


uses google protobuf , is there a plan to use Avro or other
serialization mechanisms (for example Thrift)?
if my applications already use Avro, it would be nice not having to do
a conversion


Thanks
Yang