A close friend has decided to embrace faith and call himself a messianic Jew. The term as I understand it typically involves Jews accepting Jesus as the culmination of our prophecies. In his case he was already a Christian, so this means something entirely different.
When I think of messianic Jews I think of the late Zola Leavitt and his search for an aboriginal form of Christianity returned to its original basics. I don't think his message or ministry was aimed at existing Christians.