Update: Now that the Transfer Service is up and running Customer Support contacted me again with the following:
Greetings,

We are contacting you in regards to the World Transfer Service assistance you requested. We are more than happy to help with the transfer request; however there has been a change on the gil limitation.

The gil that can be moved over is set to 1,000,000 gil per character and 100,000 per retainer. If you have anymore than the amount noted above, the excess gil will be lost after the transfer. Before we can process the world service transfer request, we will need for you to reply to this email whether or not you agree with the changes. Once we receive your reply, we will move forward with moving the characters you requested.

Thank you very much for your cooperation and understanding.
I've stated that I've agreed to their terms and hope things work out.