My Black Hat guy told me that the Administrator of this forum has the registered information for Phonetic. Information like the IP address and Time when he signed up.
I contacted most of the bitcointalk moderators. None responded. I also emailed the administrative contact for the domain and asked them to forward my response to the forum administrators. No response. Those are the options available to a white hat.
They haven't responded because they are not legally obligated to disclose that information. In fact, that's why he hasn't been ID'ed yet to begin with. In order to obtain information from web hosts, system admins, etc. the information has to be subpoenaed in a court of law. The criminal / civil case has to already be filed with a judge in order to get a subpoena. So, logically the only way to pursue this is to have someone step forward and add their name to the John Doe lawsuit, and once that is opened then the information can be retrieved. If you want a good example of how this all works, simply google any news relevant to Coinye and the ongoing lawsuit they are facing.
Aside from that, if you don't have someone with more grey/black hat skills to get the info, then there is no way to get it and you will not be able to "convince" anyone out of the kindness of their heart to disclose that kind of identifiable information unless they have a personal vendetta. Sucks, but it's the truth. :/